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Document ID us-npdescgpsdfca-2025-04-08-2 Title National Pollutant Discharge Elimination System (NPDES) Construction General Permit (CGP) for Stormwater Discharges from Construction Activities URL https://www.epa.gov/sites/default/files/2021-01/documents/2021_msgp_-_appendix_d_-_facilities_and_activities_covered.pdf Jurisdiction /us Subdomain(s) none Language Status completed Analyzed at 2026-05-12 05:31:33.514920+00:00 Relevance inventory_targeted_fetch

41 Qualitative 10 Quantitative 46 Definitions

Q Qualitative Requirements (41)

Req ID	Category	Intent	Legal Status	Name	Subdomain(s)	Context	Conditions	Confidence
#Q001	administrative	unknown	mandatory	Permit Eligibility Scope	wastewater, other	Your permit eligibility is limited to discharges from facilities in the 'sectors' of industrial activity summarized in Table D-1.		high
#Q002	prohibition	unknown	mandatory	Sector AD Election Prohibition	wastewater, other	Facilities may not elect to be covered under Sector AD. Only the Director may assign a facility to Sector AD.	Applies to facilities discharging stormwater associated with industrial activity not described by any of Sectors A-AC.	high
#Q003	administrative	reporting	mandatory	Waste Discharge Reporting Requirement	wastewater, other	persons discharging or proposing to discharge waste that could affect the quality of the waters of the State, other than into a community sewer system, shall file a ROWD containing information which may be required by the appropriate Regional Water Quality Control Board (RWQCB).	waste that could affect the quality of the waters of the State, other than into a community sewer system	high
#Q004	administrative	reporting	mandatory	Annual Fee Requirement	wastewater, other	All dischargers regulated under WDRs and NPDES permits must pay an annual fee, except dairies, which pay a filing fee only.	except dairies	high
#Q005	administrative	reporting	mandatory	Facility Information Disclosure	wastewater, other	You must provide the factual information listed below for ALL owners, operators, and locations and, where appropriate, for ALL general partners and lease holders.	ALL owners, operators, and locations	high
#Q006	reporting	reporting	mandatory	Discharge Characterization Requirement	wastewater, other	To be approved, your application MUST include a COMPLETE characterization of the discharge.	for application approval	high
#Q007	administrative	reporting	mandatory	Site Map Submission	wastewater, other	This application MUST be accompanied by a site map.		high
#Q008	administrative	reporting	mandatory	Application Certification	wastewater, other	Certification by the owner of the facility or the operator of the facility, if the operator is different from the owner, is required.	if the operator is different from the owner, operator certification is required	high
#Q009	administrative	reporting	mandatory	Authorized Signature Criteria	wastewater, other	Acceptable signatures are: 1. for a corporation, a principal executive officer of at least the level of senior vicepresident; 2. for a partnership or individual (sole proprietorship), a general partner or the proprietor; 3. for a governmental or public agency, either a principal executive officer or ranking elected/appointed official.	dependent on entity type (corporation, partnership, or government agency)	high
#Q010	prohibition	operational	mandatory	Hazardous Waste Handling Procedure	other	If you check the Hazardous Waste box, STOP and contact a representative of the RWQCB for further instructions.	Applies when the hazardous waste box is checked in the Type of Discharge section	high
#Q011	administrative	reporting	mandatory	Initial Fee Submission Timing	other	Please do NOT submit a check for your first annual fee or filing fee until requested to do so by a RWQCB representative.	New discharge applications only	high
#Q012	administrative	reporting	mandatory	Agency Application Completeness Deadline	other	A RWQCB representative will notify you within 30 days of receipt of the application form and any supplemental documents whether your application is complete.	Upon receipt of application form and supplemental documents	high
#Q013	administrative	reporting	mandatory	Federal NPDES Form Requirements	wastewater	If you are applying for a permit to discharge to surface water, you will need an NPDES permit which is issued under both State and Federal law and may be required to complete one or more of the following Federal NPDES permit application forms: Short Form A, Standard Form A, Forms 1, 2B, 2C, 2D, 2E, and 2F.	Applying for a permit to discharge to surface water	high
#Q014	administrative	reporting	mandatory	Agency Information Request Limitation	other	Pursuant to California Government code Section 65944, after an application is accepted as complete, an agency may not request any new or additional information that was not specified in the original application.	Applies after an application is accepted as complete	high
#Q015	administrative	reporting	mandatory	Facility Physical Address Requirement	other	FACILITY: Legal name, physical address including the county, person to contact, phone number, and email at the facility. (NO P.O. Box numbers. If no address exists, use street and nearest cross street).	All applicants	high
#Q016	administrative	reporting	mandatory	CEQA Lead Agency Identification	other	Name the Lead Agency responsible for completion of CEQA requirements for the project, i.e., completion and certification of CEQA documentation.	All applicants completing the CEQA section	high
#Q017	administrative	reporting	mandatory	CEQA Documentation Submission Requirement	other	If YES [Notice of Determination filed], give the date the notice was filed and enclose a copy of the Notice of Determination and the Initial Study, Environmental Impact Report, or Negative Declaration.	Applies if a Notice of Determination has been filed	high
#Q018	administrative	reporting	mandatory	Ownership Change Procedure	other	CHANGE IN OWNERSHIP/ OPERATOR: Change of legal owner of the facility. Complete Parts I, III, and IV only and contact the RWQCB to determine if additional information is required.	Applies when filing due to change in ownership	high
#Q019	administrative	reporting	mandatory	Agency Information Publication Duty	other	Agencies must publish a list of all information required in a permit application and of criteria used to determine whether the submitted information is adequate.		high
#Q020	prohibition	treatment	mandatory	Surface Water Discharge Prohibition	other	The discharge of any waste to surface waters is prohibited.		high
#Q021	prohibition	treatment	mandatory	Hazardous Waste Discharge Prohibition	other	The discharge of waste classified as 'hazardous' or 'designated' as defined in Title 22 CCR, Section 66261 and CWC Section 13173, is prohibited.		high
#Q022	operational	operational	mandatory	Pond Freeboard Requirement	wastewater	A minimum freeboard of two feet shall be maintained at all wastewater disposal ponds and wastewater storage ponds.	Applies to all wastewater disposal and storage ponds	high
#Q023	operational	operational	mandatory	Facility Storm Protection Requirement	other	All storage and disposal facilities shall be protected against erosion, overland runoff, and other impacts resulting from storm events.		high
#Q024	reporting	reporting	mandatory	Discharge Monitoring Plan Submission	other	Dischargers applying for coverage under these General WDRs shall submit with their NOI a discharge monitoring plan (DMP).	Required for Dischargers applying for coverage	high
#Q025	administrative	reporting	mandatory	Document Maintenance on Site	other	A copy of these General WDRs shall be kept at the discharge facility for reference by operating personnel.		high
#Q026	operational	operational	mandatory	Operational Control Duty	other	The Discharger shall properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) at all times to assure compliance with these General WDRs.		high
#Q027	reporting	reporting	mandatory	Endangerment Reporting Requirement	other	The Discharger shall immediately report any noncompliance potentially endangering public health or the environment. Any information shall be provided orally to the Regional Board within 24 hours of the time the Discharger becomes aware of the occurrence.	Noncompliance potentially endangering public health or environment	high
#Q028	operational	operational	mandatory	Inert Waste Load Checking Program	other	Inert solid waste facilities shall develop and implement a load checking program to ensure that all the types of waste accepted at the site are in compliance with these General WDRs.	Inert solid waste facilities	high
#Q029	design	treatment	mandatory	On-site Boring Waste Disposal Standards	other	Residual wastes discharged onsite shall meet the following requirements: (1) the discharge must be located greater than 5 feet above local groundwater level, (2) the discharge must be covered by a minimum of 1 foot of clean soil, and (3) the discharge must be located at least 100 feet from the nearest surface water.	When residual boring wastes are discharged onsite	high
#Q030	prohibition	operational	mandatory	Monitoring Well Purge Ponding Prohibition	other	Monitoring well purge water shall not be discharged in a manner causing ponding or threatening a discharge to surface waters.	Monitoring well purge water discharge	high
#Q031	prohibition	treatment	mandatory	Nonaqueous Phase Liquids Restriction	other	Discharges of liquids derived from the purging, development, or sampling of groundwater from monitoring wells shall not contain nonaqueous phase liquids (i.e., concentrations of pollutants above the solubility limits).	Liquids from purging, development, or sampling of monitoring wells	high
#Q032	administrative	reporting	mandatory	MRP Record Retention	other	Records shall be maintained for a minimum of three years from the date of the sample, measurement, or report.	Monitoring information including calibration/maintenance records and application data	high
#Q033	prohibition	health	mandatory	Pollution and Nuisance Prohibition	other	The disposal of wastes shall not cause pollution, contamination, or nuisance as defined in CWC Section 13050.		high
#Q034	prohibition	operational	mandatory	Land Ownership/Control Restriction	other	Discharge of wastes to lands not owned or controlled by the discharger is prohibited, unless the discharger has a written lease or an agreement with the owner.		high
#Q035	prohibition	treatment	mandatory	Groundwater Contamination Spread Prohibition	other	The discharge of waste causing the spread of groundwater contamination is prohibited.		high
#Q036	operational	treatment	mandatory	Boring Waste Sump and Solvent Restriction	other	Discharges of boring waste, drilling mud, and cuttings from well-drilling operations shall be discharged to on-site sumps and shall not contain halogenated solvents.	Boring waste, drilling mud, and cuttings from well-drilling operations	high
#Q037	reporting	reporting	mandatory	New Site Notification Duty	other	Dischargers of well development water, boring waste, and clear water discharges shall provide written notice to the Regional Board before initiating any discharge to a new site.	Applies to well development water, boring waste, and clear water discharges	high
#Q038	operational	operational	mandatory	Discharge Management Plan Requirement	other	The Discharger shall develop a discharge management plan incorporating contingency measures, should sampling results show violation of water quality standards.		high
#Q039	administrative	reporting	mandatory	Ownership Change Notification Duty	other	In the event of any change in control or ownership of land or waste discharge facilities presently owned or controlled by the discharger, the discharger shall notify the succeeding owner or operator of the existence of these General WDRs by letter, a copy of which shall be immediately forwarded to the appropriate Regional Board office.	Change in control or ownership	high
#Q040	administrative	operational	mandatory	Right of Entry and Inspection	other	The Discharger shall allow the Regional Board or an authorized representative... to: a. Enter upon the Discharger's premises... b. Access and copy... any records... c. Inspect... any facilities, equipment... d. Sample or monitor... any substances or parameters at any location.	Upon the presentation of credentials and other documents as may be required by law	high
#Q041	monitoring	reporting	mandatory	Certified Laboratory Requirement	other	Unless otherwise approved by the appropriate Regional Water Quality Control Board (Regional Board) Executive Officer, all analyses shall be conducted at a laboratory certified for such analyses by the California Department of Health Services.		high

P Quantitative Requirements (10)

Req ID	Category	Intent	Legal Status	Name	Subdomain(s)	Limit Type	Limit Value	Context	Conditions	Confidence
#P001	design	operational	mandatory	design flow	wastewater	requirement	>= 1.0 mgd	Treatment Works treating domestic sewage or any other sewage sludge or wastewater treatment device or system, used in the storage, treatment, recycling, and reclamation of municipal or domestic sewage	Including land dedicated to the disposal of sewage sludge that are located within the confines of the facility	high
#P002	chemical	health	mandatory	Chlorine (Freshwater Aquatic Life Protection)	aquatic life	requirement	20 µg/L	Maximum Daily Effluent Limitation for freshwater aquatic life protection	Applies outside the treatment area during treatment, and in the treatment area after treatment	high
#P003	chemical	health	mandatory	Chlorine (California Ocean Plan)	aquatic life	requirement	10 µg/L	Maximum Daily Effluent Limitation for saltwater	Applicable to marine waters of California	high
#P004	chemical	health	mandatory	Copper (Dissolved Saltwater Chronic)	aquatic life	requirement	3.1 µg/L	Chronic receiving water limitation for saltwater	Applicable where salinity is >= 10 parts per thousand 95% of the time	high
#P005	microbiological	health	mandatory	Pf CL145A-S	aquatic life	requirement	6 mg Active Ingredient/Liter	Receiving water limitation for Pseudomonas fluorescens strain CL145A	Measured using a direct turbidity correlation per product label instructions	high
#P006	physical	health	mandatory	Ambient Temperature Increase	aquatic life	requirement	<= 5 ºF	Receiving water limitation for temperature	Maximum allowable increase in ambient temperature	high
#P007	physical	operational	mandatory	Hardness Cap for Copper Criteria	aquatic life	requirement	400 mg/L	Hardness value used for calculating freshwater copper criteria	If ambient hardness is > 400 mg/L as calcium carbonate, 400 mg/L shall be used	high
#P008	operational	reporting	mandatory	Notice of Intent Submission Lead Time	other	requirement	>= 90 days	Application lead time for permit coverage	Prior to the expected application of pesticides	high
#P009	operational	reporting	mandatory	Application Completeness Notification Period	other	requirement	<= 30 days	The RWQCB representative will notify the applicant within 30 days of receipt of the application form whether the application is complete.	Applies upon receipt of the application form and supplemental documents	high
#P010	design	reporting	recommended	Site Map Scale	other	requirement	1:24,000 ratio	Applicants are instructed to limit site maps to the specified scale.	Required as part of a complete characterization of the discharge	high

D Definitions (46)

Req ID	Name	Context	Confidence
#D001	Discharges with the lowest TTWQ	Discharges with the lowest TTWQ are those discharges of waste that could degrade water quality without violating water quality objectives or cause a minor impairment of designated beneficial uses.	high
#D002	monitoring well facility	A facility where monitoring well(s) have been installed to monitor the migration or levels of a pollutant or the effects and/or migration of a particular discharge.	medium
#D003	Well Development Discharge	Well Development Discharge is any discharge of water to land during the development of a water well.	high
#D004	Monitoring Well Purge Water Discharge	Monitoring Well Purge Water Discharge is any discharge of well water to land in the immediate vicinity of the monitoring well site during monitoring well sampling.	high
#D005	Boring Waste Discharge	Boring Waste Discharge is any discharge of drilling mud and cuttings from well-drilling operations or any other borings in uncontaminated soils.	high
#D006	Water main, storage tank, and hydrant flushing discharges	Water main, storage tank, and hydrant flushing discharges are discharges of potable or untreated clear water to land from water line and tank flushing operations.	high
#D007	Pipeline and Tank Hydrostatic Testing Discharges	Pipeline and Tank Hydrostatic Testing Discharges are discharges of potable or untreated clear water to land from hydrostatic testing of pipelines and tanks.	high
#D008	Commercial and Public Swimming Pool Discharges	Commercial and Public Swimming Pool Discharges are discharges of swimming pool water to land.	high
#D009	Small Temporary Dewatering Projects	Small Temporary Dewatering Projects are projects that discharge groundwater to land from small construction projects, excavation projects, or dewatering of underground utility vaults.	high
#D010	Small Inert Solid Waste Disposal Operations	Small Inert Solid Waste Disposal Operations are operations or facilities, covering two acres of land or less, that accept wastes, which do not contain hazardous waste or soluble pollutants at concentrations in excess of applicable water quality objectives and do not contain significant quantities of decomposable waste.	high
#D011	Cooling Discharge	Cooling Discharge is non-contact cooling water discharge, air conditioner condensate discharge, discharge from evaporators, and discharge from heat exchangers.	high
#D012	'Waters of the State'	'Waters of the State' as defined in CWC Section 13050(e)	high
#D013	lowest Complexity rating	Low threat discharges that do not require any chemical, biological, or physical treatment have the lowest Complexity rating.	high
#D014	Regional Board Executive Officer	Regional Board Executive Officer or designee.	high
#D015	Biological Resources	As defined by the CEQA, Environmental Checklist Form, Title 14, California Code of Regulation, Appendix G, Section IV.	high
#D016	Cultural Resources	As defined by the CEQA, Environmental Checklist Form, Title 14, California Code of Regulation, Appendix G, Section V.	high
#D017	Aesthetics	As defined by the CEQA, Environmental Checklist Form, Title 14, California Code of Regulation, Appendix G, Section I.	high
#D018	Air Quality	As defined by the CEQA, Environmental Checklist Form, Title 14, California Code of Regulation, Appendix G, Section III	high
#D019	pollution	as defined in CWC Section 13050.	high
#D020	contamination	as defined in CWC Section 13050.	high
#D021	nuisance	as defined in CWC Section 13050.	high
#D022	hazardous	as defined in Title 22 CCR, Section 66261 and CWC Section 13173	high
#D023	designated	as defined in Title 22 CCR, Section 66261 and CWC Section 13173	high
#D024	Appropriate Regional Board	Appropriate Regional Board is the Regional Board that regulates discharges of pollutants to waters of the State for the area that the proposed discharge will occur.	high
#D025	nonaqueous phase liquids	concentrations of pollutants above the solubility limits	high
#D026	ROWD	report of waste discharge	high
#D027	TTWQ	Threat to Water Quality	high
#D028	MUN	municipal supply	high
#D029	IND	industrial service supply	high
#D030	PROC	industrial process supply	high
#D031	FRESH	fresh water replenishment	high
#D032	GWR	groundwater recharge	high
#D033	AGR	agricultural supply	high
#D034	NOI	Notice of Intent	high
#D035	DMP	discharge monitoring plan	high
#D036	CWC	California Water Code	high
#D037	CCR	California Code of Regulations	high
#D038	CEQA	California Environmental Quality Act	high
#D039	MSDS	Material Safety Data Sheets	high
#D040	SWRCB	State Water Resources Control Board	high
#D041	WDRs	Waste Discharge Requirements	high
#D042	Regional Board	Regional Water Quality Control Board	high
#D043	Basin Plan	Water Quality Control Plan	high
#D044	NOT	Notice of Termination	high
#D045	EIR	Environmental Impact Report	high
#D046	USEPA	U.S. Environmental Protection Agency	high