California Environmental Law Glossary
A practical reference for California environmental law terms, agency orders, cleanup concepts, due diligence issues, water quality requirements, land use approvals, and contaminated property topics.
Browse the directory below or use the letter links to jump directly to a term. This resource is educational and does not replace legal advice for a specific property, permit, agency order, transaction, lawsuit, or cleanup decision.
A-Z Environmental Law Glossary
A
Air Pollution Control District (APCD)
An Air Pollution Control District (APCD) is a California local air district that implements air quality rules, permits, and enforcement for stationary sources. APCD requirements can affect manufacturing, construction, fuel use, coating operations, and other regulated activities.
Air Quality Management District (AQMD)
An Air Quality Management District (AQMD) is a local or regional California air agency that regulates stationary sources and local air quality within its jurisdiction. Facilities may encounter AQMD rules through equipment permits, emissions reporting, odor issues, dust controls, or enforcement.
Asbestos Abatement
Asbestos abatement is the controlled removal, encapsulation, repair, or management of asbestos-containing materials. It commonly matters before demolition, tenant improvements, renovation, redevelopment, and disposal of regulated building materials.
ASTM Environmental Standards
ASTM environmental standards are consensus technical practices used by environmental professionals, including standards for Phase I and Phase II environmental site assessments. They help define recognized methods for evaluating property conditions and environmental risk.
B
Basin Plan
A Basin Plan is a regional Water Quality Control Plan adopted by a California regional water quality control board. It identifies waters within the region, their beneficial uses, water quality objectives, and implementation programs for waters within a region and guides policymaking.
Beneficial Reuse
Beneficial reuse is the use of treated water, soil, byproducts, or other materials in a way that provides practical value while meeting environmental requirements. It can support redevelopment, waste reduction, water conservation, and sustainable project planning.
Best Management Practices (BMPs)
Best Management Practices (BMPs) are practical controls used to reduce pollution, prevent releases, and comply with permit conditions. In stormwater, construction, industrial, and remediation settings, BMPs often include housekeeping, containment, erosion controls, inspection, and response procedures.
Biosolids
Biosolids are treated municipal sewage sludge managed for use or disposal under federal and California requirements. Land application, reuse, monitoring, and reporting must account for pollutants, pathogens, vector attraction reduction, and water quality concerns.
Brownfield Redevelopment
Brownfield redevelopment is the reuse of property where expansion, financing, or redevelopment may be complicated by known or suspected contamination. In California, these projects often require coordinated due diligence, cleanup planning, agency oversight, and land use strategy.
C
California Environmental Quality Act (CEQA)
The California Environmental Quality Act (CEQA) requires public agencies to evaluate, disclose, and consider the environmental effects of discretionary projects they approve. CEQA issues often arise in development, infrastructure, remediation, and land use disputes.
California Regional Water Quality Control Board
A California Regional Water Quality Control Board is one of nine state agencies, divided by region, responsible for protecting water quality within a defined part of the state. Regional Water Boards issue permits and certifications, investigate potential threats to state waters, oversee site cleanup, enforce orders and regulations, and apply basin plan requirements.
CERCLA
CERCLA, also known as Superfund, is the federal law governing cleanup authority and liability for releases or threatened releases of hazardous substances. It is especially important in contaminated property transactions, cost recovery claims, and allocation disputes.
Class I Hazardous Waste Facility
A Class I hazardous waste facility is a facility or waste management unit authorized to handle hazardous waste under stringent design, operation, monitoring, and closure requirements. These facilities are central to hazardous waste disposal and long-term containment planning.
Clean Water Act
The Clean Water Act is the federal law that regulates discharges of pollutants to waters of the United States and supports programs such as NPDES permitting, water quality standards, Section 401 certification, and Section 404 dredge-and-fill permitting.
Cleanup and Abatement Order (CAO)
A Cleanup and Abatement Order (CAO) is a Water Board enforcement order issued under Water Code section 13304 that can require investigation, cleanup, abatement, or remedial action. CAOs are often issued when a discharge has caused or threatens pollution, contamination, or nuisance.
Coastal Development Permit
A Coastal Development Permit is required for many forms of development within California's coastal zone. It connects project approvals to Coastal Act policies, local coastal programs, public access, water quality, visual resources, and habitat protection.
Conditional Use Permit
A conditional use permit is a local land use approval allowing a use that may be appropriate only if specific conditions are met. Environmental issues can shape permit conditions related to operations, traffic, noise, hazardous materials, stormwater, or site cleanup.
Consent Decree
A consent decree is a court-approved settlement that resolves an enforcement case or dispute while imposing enforceable obligations. In environmental matters, it may require cleanup work, compliance measures, reporting, penalties, or stipulated timelines.
Construction General Permit
The Construction General Permit regulates stormwater discharges from construction activities that require permit coverage. It typically requires erosion and sediment controls, a SWPPP, inspections, monitoring, and documentation during construction.
Contaminated Soil
Contaminated soil is soil affected by hazardous substances such as petroleum, metals, chemicals, solvents, pesticides, or other pollutants at levels that may require investigation, controls, or cleanup. It can affect property value and use, development and construction planning, worker safety, and agency closure.
Corrective Action
A corrective action is the formal investigation and cleanup process required by regulatory agencies—such as the DTSC, Water Boards, or EPA—to address hazardous substance releases, contamination, or regulatory noncompliance under programs like RCRA or UST mandates.
Cumulative Impacts
Cumulative impacts are environmental effects that result from a project combined with other past, present, or reasonably foreseeable actions. They are important in CEQA and NEPA review because a project with modest direct impacts can still contribute to a broader environmental burden.
D
Department of Toxic Substances Control (DTSC)
The Department of Toxic Substances Control (DTSC) is California's primary agency for hazardous waste regulation and many contaminated site cleanup matters. Property owners, developers, and businesses may encounter DTSC through permitting, investigations, cleanup agreements, enforcement orders, and voluntary cleanup pathways.
Dewatering Permit
A dewatering permit governs the removal and discharge of groundwater, stormwater, or accumulated water from construction, excavation, or remediation sites. It is important when pumped water may contain sediment, petroleum, solvents, metals, or other pollutants.
Discharge Permit
A discharge permit authorizes a regulated release to water, land, sewer, or air under defined conditions. Permit terms can control monitoring, treatment, reporting, discharge limits, and operational practices.
Due Diligence
Due diligence is the investigation performed before a transaction, investment, lease, or development decision. In environmental law, it focuses on contamination, permits, compliance history, agency records, cleanup obligations, and risk allocation.
E
Endangered Species Act
The Endangered Species Act refers to either the federal or California laws protecting listed species and, in some settings, their habitat. It can affect development, infrastructure, water projects, restoration, and permitting where protected species may be present.
Environmental Audit
An environmental audit is a structured review of a facility, property, or operation for compliance obligations and environmental risk. It can identify permit gaps, reporting issues, waste handling concerns, stormwater problems, and corrective actions.
Environmental Compliance
Environmental compliance means meeting the requirements of environmental laws, permits, plans, agency orders, reporting duties, and operational rules. For California businesses and property owners, compliance often spans water, waste, air, hazardous materials, and land use obligations.
Environmental Consultant
An environmental consultant is a technical professional who evaluates environmental conditions, performs sampling, prepares reports, and supports compliance or cleanup work. Consultants often work with attorneys, property owners, developers, lenders, and agencies.
Environmental Covenant
An environmental covenant is a recorded property restriction or institutional control used to manage residual contamination. It may limit land use, require maintenance of engineering controls, preserve access rights, or document ongoing obligations.
Environmental Due Diligence
Environmental due diligence is the process of evaluating environmental conditions, regulatory history, and liability risk before buying, selling, financing, leasing, or redeveloping property. It helps decision-makers understand contamination, permits, cleanup obligations, and potential liability protections.
Environmental Impact Report (EIR)
An Environmental Impact Report (EIR) is a CEQA document prepared when a project may have significant environmental effects. It analyzes impacts, alternatives, mitigation measures, public comments, and agency findings before project approval.
Environmental Indemnity
An environmental indemnity is a contract provision allocating responsibility for environmental losses, cleanup costs, claims, or liabilities. It is commonly used in real estate, lending, leasing, merger, and cleanup settlement documents.
Environmental Insurance
Environmental insurance is coverage designed to address pollution conditions, cleanup costs, third-party claims, or related environmental liabilities. It can support transactions and redevelopment, but exclusions, known conditions, and notice requirements must be reviewed carefully.
Environmental Liability
Environmental liability is legal responsibility for contamination, compliance violations, cleanup obligations, natural resource impacts, or third-party harm. Liability may arise from ownership, operation, disposal, contractual promises, or statutory responsibility.
Environmental Litigation
Environmental litigation is the broad category of lawsuits and administrative disputes involving environmental statutes, permits, contamination, toxic exposure, cleanup responsibility, regulatory enforcement, cost recovery, CEQA and land use challenges, nuisance and trespass claims, citizen suits, and contract-based environmental obligations. These matters often turn on technical evidence, agency records, statutory deadlines, and risk allocation.
Environmental Mitigation
Environmental mitigation refers to actions that avoid, minimize, reduce, rectify, or compensate for environmental impacts. Mitigation can appear in CEQA documents, permits, cleanup plans, settlement terms, and construction conditions.
Environmental Monitoring
Environmental monitoring is the repeated measurement of environmental conditions to evaluate compliance, trends, exposure, or remedy performance. It may include sampling of groundwater, surface water, soil vapor, air, stormwater, wastewater, or soil.
Environmental Remediation
The formal investigation, cleanup, treatment, or containment of contamination in soil, groundwater, soil vapor, sediment, or buildings using a strategy tailored to site conditions, regulatory expectations, future land use, and risk management goals.
F
Feasibility Study
A feasibility study evaluates cleanup alternatives for a contaminated site after investigation identifies the nature and extent of impacts. It compares potential remedies based on effectiveness, implementability, cost, timing, and regulatory acceptance.
Federal Clean Water Act
The national legal framework for regulating pollutant discharges and protecting surface waters, which in California operates directly alongside the Porter-Cologne Act through state-issued Water Board permits.
Former Gas Station Contamination
Former gas station contamination usually involves petroleum releases from underground storage tanks, dispensers, piping, or historic fueling operations. These sites can raise soil, groundwater, vapor intrusion, redevelopment, and closure issues.
G
Greenhouse Gas Reporting
Greenhouse gas reporting is the measurement and submission of emissions data for regulated sources or entities. It may affect industrial facilities, fuel suppliers, manufacturers, and companies subject to federal or California climate reporting programs.
Groundwater Contamination
Groundwater contamination occurs when pollutants migrate into underground water resources that may support drinking water, irrigation, industrial use, or ecological systems. In California, groundwater impacts can trigger monitoring, cleanup orders, replacement water issues, and long-term agency oversight.
Groundwater Monitoring
Groundwater monitoring is the periodic collection and analysis of groundwater data to evaluate contamination, plume movement, remedy performance, or compliance with agency requirements. It commonly relies on monitoring wells and approved sampling protocols.
H
Hazardous Materials Business Plan (HMBP)
A Hazardous Materials Business Plan (HMBP) documents hazardous material inventories, emergency response procedures, employee training, and facility site information. In California, HMBP implementation is overseen by CalEPA at the state level and CUPAs or participating agencies locally.
Hazardous Materials Handling
Hazardous materials handling includes the storage, use, transfer, labeling, reporting, and emergency planning practices for hazardous materials at a facility. Poor handling can lead to releases, worker safety issues, fire code concerns, and environmental enforcement.
Hazardous Substance Release
A hazardous substance release is a spill, leak, discharge, emission, or disposal of a regulated substance into the environment. Releases can trigger notification duties, emergency response, investigation, cleanup, and liability under federal or California law.
Hazardous Waste
Hazardous waste is waste regulated because its chemical, physical, or toxic properties can pose risks if improperly handled, stored, transported, treated, or disposed. California businesses must evaluate waste streams carefully because generator status, manifests, storage rules, and disposal options can affect compliance and liability.
Hazardous Waste Generator
A hazardous waste generator is a person or facility whose activities produce hazardous waste. Generator obligations can include waste identification, accumulation limits, labeling, manifests, training, contingency planning, and reporting.
Hazardous Waste Manifest
A hazardous waste manifest is the tracking document used when hazardous waste is transported off-site for treatment, storage, recycling, or disposal. It documents the chain of custody from generator to destination facility.
Hydrogeologic Investigation
A hydrogeologic investigation studies groundwater movement, aquifer conditions, geology, contaminant migration, and water quality. It is often needed to understand plume behavior, design monitoring networks, and evaluate cleanup options.
I
Indoor Air Quality
Indoor air quality refers to conditions inside buildings that may affect occupant health, comfort, or regulatory response. Environmental law issues can involve vapor intrusion, asbestos, lead, mold, odors, combustion byproducts, or chemical or materials releases.
Industrial Stormwater Permit
An industrial stormwater permit regulates stormwater discharges from facilities where industrial activities or materials may be exposed to rain or runoff. Coverage usually requires a Stormwater Pollution Prevention Plan, monitoring, best management practices, and reporting through the California Water Boards.
Industrial Wastewater Discharge
An industrial wastewater discharge is process water or wastewater generated by industrial operations and released to sewer, land, or surface water under applicable requirements. Permits may regulate pollutants, pretreatment, monitoring, and reporting.
Injunctive Relief
Injunctive relief is a court order requiring a party to take action or stop conduct. In environmental cases, it may require cleanup, compliance measures, access, monitoring, reporting, or operational changes.
Innocent Landowner Defense
The innocent landowner defense is a CERCLA liability protection for certain property owners who acquired contaminated property without knowing, and having no reason to know, of contamination after appropriate inquiry. It requires careful pre-acquisition diligence and ongoing compliance with statutory conditions.
J
Joint and Several Liability
Joint and several liability allows one responsible party to be held liable for an entire indivisible harm, even when other parties also contributed. It is a central risk in CERCLA and contaminated site cost allocation disputes.
L
Land Use Entitlement
A land use entitlement is a discretionary approval needed to develop, modify, or operate property in a particular way. Entitlements can intersect with CEQA review, conditional use permits, coastal permits, mitigation measures, and contaminated site cleanup.
Land Use Restriction
A land use restriction limits how property may be used to protect people or the environment when contamination remains in place. Restrictions may limit residential use, excavation, groundwater use, building design, or disturbance of engineered controls.
Lead-Based Paint
Lead-based paint is paint or coating that contains lead and may create health, renovation, disclosure, and waste concerns. It is especially relevant in older buildings, demolition, tenant improvements, schools, residential properties, and redevelopment projects.
Liability Allocation
Liability allocation is the process of assigning environmental responsibility among owners, operators, sellers, tenants, insurers, generators, transporters, or other parties. It can occur through contracts, settlements, cost recovery litigation, or agency negotiations.
LUST Site (Leaking Underground Storage Tank)
A LUST site is a leaking underground storage tank site where contamination has been discovered and a cleanup case has been opened. These sites commonly involve petroleum impacts to soil, groundwater, soil vapor, and drinking water receptors.
M
Mitigated Negative Declaration
A Mitigated Negative Declaration is a CEQA document used when a project could have significant environmental effects but revisions or mitigation measures reduce those impacts below a level of significance. It usually includes enforceable mitigation and monitoring commitments.
Mitigation Measures
Mitigation measures are specific actions adopted to reduce or avoid environmental impacts. In CEQA and permitting contexts, they should be clear, enforceable, measurable, and integrated into project approvals or monitoring programs.
Monitoring Well
A monitoring well is a well installed to collect data from groundwater elevation, flow, chemical vapors, and chemistry data. Monitoring wells are used to define plume boundaries, evaluate cleanup progress, and support regulatory closure decisions.
Municipal Separate Storm Sewer System (MS4)
A Municipal Separate Storm Sewer System (MS4) is a publicly owned storm drain system that conveys stormwater separately from sanitary sewer flows. MS4 permits regulate municipal stormwater programs, illicit discharge controls, construction oversight, and pollution prevention.
N
National Environmental Policy Act (NEPA)
The National Environmental Policy Act (NEPA) requires federal agencies to assess environmental effects before taking major federal actions. NEPA review can involve categorical exclusions, environmental assessments, findings of no significant impact, or environmental impact statements.
National Pollutant Discharge Elimination System (NPDES)
The National Pollutant Discharge Elimination System (NPDES) is the Clean Water Act permit program for point source discharges of pollutants to waters of the United States. In California, NPDES permits are administered through the State Water Board and Regional Water Boards.
Notice of Violation (NOV)
A Notice of Violation (NOV) is a written agency notice alleging noncompliance with a law, permit, order, or rule. An NOV can lead to corrective actions, penalties, inspections, negotiations, or formal enforcement if not resolved.
O
Oversight Agency
An oversight agency is the government agency supervising environmental investigation, cleanup, compliance, or permitting for a site or activity. Examples include DTSC, Regional Water Boards, local CUPAs, air districts, and other specialized agencies.
P
Per- and Polyfluoroalkyl Substances (PFAS)
Per- and polyfluoroalkyl substances (PFAS) are a large class of persistent manufactured chemicals that can affect water, soil, biosolids, and industrial sites. PFAS issues often require careful sampling, source evaluation, risk assessment, and attention to evolving federal and California requirements.
PFOA
PFOA, or perfluorooctanoic acid, is a widely studied PFAS compound historically used in manufacturing and consumer products. It is frequently investigated in water, soil, industrial, landfill, airport, and firefighting-foam contexts.
PFOS
PFOS, or perfluorooctane sulfonic acid, is one of the most studied PFAS compounds and has been associated with environmental persistence, water contamination, and regulatory attention. It is often evaluated with PFOA and other PFAS in drinking water, groundwater, and site investigations.
Phase I Environmental Site Assessment
A Phase I Environmental Site Assessment is a non-intrusive review of a property's current and historical uses, records, site conditions, and surrounding area to identify recognized environmental conditions. It is commonly performed under ASTM E1527 before commercial real estate transactions.
Phase II Environmental Site Assessment
A Phase II Environmental Site Assessment uses sampling and technical investigation to evaluate potential contamination identified during due diligence or site review. It may include soil, groundwater, soil vapor, indoor air, or building material testing depending on the concern.
Pollution Legal Liability
Pollution legal liability is specialized insurance coverage for certain pollution conditions, cleanup costs, third-party claims, or environmental losses. It is often considered in real estate transactions, redevelopment, lending, and risk transfer negotiations.
Porter-Cologne Water Quality Control Act
The Porter-Cologne Water Quality Control Act is California's core water quality law and the foundation for many State Water Board and Regional Water Board programs. It supports waste discharge requirements, basin planning, investigations, and enforcement for discharges affecting waters of the state.
Preliminary Endangerment Assessment
A Preliminary Endangerment Assessment is an early-stage California environmental investigation used to evaluate whether contamination may pose a risk and whether further action is needed. It can be important for schools, brownfields, DTSC oversight, and redevelopment planning.
Prop 65
Prop 65 is California's warning law for exposures to chemicals known to the state to cause cancer, birth defects, or other reproductive harm. Businesses may face labeling, signage, settlement, or enforcement issues when listed chemicals are present.
Public Trust Doctrine
The Public Trust Doctrine recognizes state responsibilities to protect certain public resources such as navigation, fisheries, wildlife, recreation, and related water resources. In California, it can influence water rights, coastal, environmental review, and resource management decisions.
R
Redevelopment Agency
A redevelopment agency is a public entity term often found in older California land use, brownfield, and property records. Because California redevelopment agencies were dissolved, references to them should be reviewed in context with successor agency history, funding, and property obligations.
Regulatory Agency
A regulatory agency is a government body with authority to implement, permit, monitor, or enforce environmental laws. Identifying the correct agency is essential because requirements can differ by medium, location, pollutant, and project type.
Remedial Action Plan
A Remedial Action Plan describes the selected cleanup approach for a contaminated site and how it will be implemented. It may address cleanup goals, engineering controls, monitoring, excavation, treatment, institutional controls, and agency approval.
Resource Conservation and Recovery Act (RCRA)
The Resource Conservation and Recovery Act (RCRA) is the federal law governing hazardous waste generation, transportation, treatment, storage, and disposal. RCRA also supports corrective action requirements for certain hazardous waste facilities.
Response Action
A response action is a cleanup, removal, containment, investigation, or remedial step taken to address a release or threatened release. The term is commonly used in CERCLA, state cleanup programs, and contaminated property agreements.
Risk Assessment
A risk assessment evaluates how chemicals or pollutants may affect people, property, or the environment based on toxicity, exposure pathways, receptors, and site conditions. It helps determine cleanup goals, mitigation needs, and acceptable future uses.
S
Sensitive Receptors
Sensitive receptors are people or land uses that may be more vulnerable to environmental impacts, such as residences, schools, hospitals, day care centers, and elder care facilities. Their presence can affect air, vapor intrusion, noise, risk assessment, and permitting decisions.
Site Characterization
Site characterization is the process of defining environmental conditions at a property, including contaminant types, concentrations, locations, migration pathways, and affected media. It provides the technical foundation for risk assessment, cleanup design, and closure strategy.
Soil Vapor Intrusion
Soil vapor intrusion is the migration of chemical vapors from contaminated soil or groundwater through subsurface air spaces into buildings. It is commonly associated with chlorinated solvents, petroleum hydrocarbons, and redevelopment of impacted properties.
Spill Prevention Control and Countermeasure Plan (SPCC)
A Spill Prevention Control and Countermeasure Plan (SPCC) is an oil spill prevention plan for covered facilities that store, use, or handle oil and could discharge to navigable waters or adjoining shorelines. The plan focuses on prevention, containment, inspections, and response procedures.
Storm Water Pollution Prevention Plan (SWPPP)
A Storm Water Pollution Prevention Plan (SWPPP) identifies sources of stormwater pollution and the controls used to prevent or reduce discharges. SWPPPs are central to California construction and industrial stormwater permit compliance.
Supplemental Environmental Project (SEP)
A Supplemental Environmental Project (SEP) is an environmentally beneficial project that may be included in an enforcement settlement when allowed by applicable policy and law. SEPs are typically connected to the violation and are separate from basic compliance obligations.
T
Title V Air Permit
A Title V air permit is a federal operating permit for major sources of air emissions. It consolidates applicable air requirements into an enforceable permit with monitoring, reporting, certification, and public participation obligations.
Total Maximum Daily Load (TMDL)
A Total Maximum Daily Load (TMDL) is a pollution budget for an impaired water body. TMDLs allocate allowable pollutant loading and can influence permits, stormwater requirements, monitoring, and restoration measures.
Toxic Tort
A toxic tort is a civil claim alleging personal injury, property damage, or economic harm from exposure to chemicals, pollutants, hazardous substances, or environmental contamination. These cases often involve causation, expert testimony, exposure pathways, and regulatory history.
Treatment Storage and Disposal Facility (TSDF)
A Treatment Storage and Disposal Facility (TSDF) manages hazardous waste through treatment, storage, or disposal under strict technical and permitting standards. TSDF status carries significant compliance, recordkeeping, corrective action, and closure obligations.
U
Underground Storage Tank (UST)
An underground storage tank (UST) is a tank system, including connected piping, used to store hazardous substances and located substantially below ground. UST compliance and cleanup issues commonly involve petroleum releases, leak prevention, corrective action, and GeoTracker records.
Unilateral Administrative Order
A Unilateral Administrative Order is an enforcement order issued by an agency without a negotiated settlement. In Superfund and other environmental contexts, it can require investigation, cleanup, response work, or other compliance actions.
V
Vapor Intrusion
Vapor intrusion occurs when vapors from contaminated soil or groundwater migrate into overlying buildings and affect indoor air. It is a major issue for former dry cleaners, gas stations, industrial properties, multifamily projects, and urban infill redevelopment.
Voluntary Cleanup Program
A Voluntary Cleanup Program allows property owners, developers, or responsible parties to investigate and clean up contamination under agency oversight outside a purely enforcement-driven path. It can support brownfield redevelopment, financing, and regulatory closure.
W
Waste Discharge Requirements (WDRs)
Waste Discharge Requirements (WDRs) are Water Board requirements for discharges of waste that may affect waters of the state. They can apply to land discharges, dredged or fill material, recycled water, wastewater, cleanup projects, and other regulated activities.
Waste Minimization
Waste minimization is the practice of reducing the amount, toxicity, or risk of waste generated by a facility or project. It can lower disposal costs, reduce compliance exposure, and support pollution prevention goals.
Water Board 13267 Order
A Water Board 13267 Order is an information-gathering order issued under California Water Code section 13267. It can require technical or monitoring reports from parties connected to a discharge or suspected discharge that may affect water quality.
Water Board 13304 Order
A Water Board 13304 Order is a cleanup and abatement order issued under California Water Code section 13304. It may require responsible parties to investigate, clean up, abate, or take remedial action for waste that has caused or threatens pollution or nuisance.
Water Quality Control Plan
A Water Quality Control Plan establishes water quality objectives, beneficial uses, and implementation programs for a region or statewide subject area. Basin Plans are a key form of Water Quality Control Plan in California.
Water Rights
Water rights are legal rights or permissions to use water for reasonable and beneficial purposes. In California, water rights issues can involve diversions, permits, riparian rights, appropriative rights, groundwater, public trust resources, and agency oversight.
Wetlands Delineation
Wetlands delineation is the technical process of identifying and mapping wetland boundaries for permitting and environmental review. It can affect Clean Water Act, Porter-Cologne, Coastal Act, CEQA, and project design decisions.
About This Environmental Law Knowledge Center
California environmental law affects how property is bought, developed, operated, cleaned up, and defended when agencies or private parties raise concerns about contamination, discharges, permits, land use, or enforcement. This Knowledge Center is designed as a practical glossary for California property owners, developers, manufacturers, lenders, landlords, tenants, and businesses.
The definitions above connect legal and technical terms across environmental compliance, environmental litigation, due diligence, remediation, water law, land use, contaminated property, hazardous waste, air quality, CEQA, and regulatory enforcement.
Related Core Concepts
Environmental Law
The legal framework for pollution control, environmental review, natural resources, land use, hazardous substances, cleanup responsibility, permitting, compliance, enforcement, and litigation.
Environmental Compliance
The work of meeting permit terms, reporting duties, operating requirements, hazardous materials rules, waste obligations, and agency orders.
Environmental Litigation
Lawsuits and administrative disputes involving contamination, permits, cleanup responsibility, toxic exposure, enforcement, CEQA, nuisance, trespass, citizen suits, and contractual environmental obligations.
Environmental Due Diligence
The investigation of environmental and legal risk before a real estate transaction, corporate acquisition, lease, loan, redevelopment project, or operational change.
Environmental Remediation
The cleanup or management of contamination in soil, groundwater, soil vapor, sediment, surface water, or buildings to reduce risk and support approved use.
Water Law
Legal issues involving water rights, water quality, discharges, stormwater, wastewater, wetlands, public trust resources, and Water Board permitting and enforcement.
Land Use
The connection between environmental requirements and project approvals, CEQA review, coastal development permits, conditional use permits, entitlements, and mitigation measures.
Contaminated Property
Real estate affected by known or suspected hazardous materials releases that may influence purchase terms, financing, redevelopment, cleanup, insurance, and future use.
Regulatory Enforcement
Agency action through notices, directives, penalties, orders, settlements, or litigation to address alleged noncompliance or environmental harm.