Clean Water Act discharge permit · NPDES CA0024040

ANCHOR BAY WWTF, Anchor Bay, CA: NPDES CA0024040 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
101Pollutants under a numeric limit
6Pollutants with an effluent exceedance

ANCHOR BAY WWTF, held by Mendocino County Water Works District No. 2, holds NPDES permit CA0024040, which discharges to Pacific Ocean. EPA’s file records it issued April 7, 2016 and expiring May 31, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	ANCHOR BAY WWTF
Permittee as filed	Mendocino County Water Works District No. 2
NPDES ID	CA0024040
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	April 7, 2016
Expiration date	May 31, 2021
Address	Anchor Bay, CA 95445
Receiving water	PACIFIC OCEAN

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

102Pollutants on file
101Under a numeric limit
101With a violation of any kind
6With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant; the 60 with the most exceedances of 102 are shown.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Chlorine, total residual	6	26	20	June 30, 2026	2,192% over the limit
Coliform, total general	4	16	12	September 30, 2024	99,999% over the limit
Solids, suspended percent removal	2	11	9	February 28, 2025	227% over the limit
BOD, 5-day, percent removal	2	7	5	February 28, 2025	99,999% over the limit
BOD, 5-day, 20 deg. C	8	6	2	April 30, 2017	500% over the limit
Turbidity	6	7	1	January 31, 2018
Solids, settleable	6	6	0
Solids, total suspended	8	4	0
Flow, in conduit or thru treatment plant	8	4	0
pH	4	4	0
Tributyltin	1	3	0
N-Nitrosodimethylamine [NDMA]	1	3	0
Halomethanes	1	3	0
Nitrogen, ammonia total [as N]	2	2	0
Radioactivity	1	2	0
Cyanide, total [as CN]	1	2	0
Arsenic, total recoverable	1	2	0
Selenium, total recoverable	1	2	0
Thallium, total recoverable	1	2	0
Beryllium, total recoverable [as Be]	1	2	0
Chromium, hexavalent [as Cr]	1	2	0
Chromium, trivalent [as Cr]	1	2	0
Nickel, total recoverable	1	2	0
Silver total recoverable	1	2	0
Cadmium, total recoverable	1	2	0
Lead, total recoverable	1	2	0
Antimony, total recoverable	1	2	0
2-Methyl-4,6-dinitrophenol	1	2	0
Polynuclear Aromatic Hydrocarbons [PAHs]	1	2	0
Dichlorobromomethane	1	2	0
Carbon tetrachloride	1	2	0
1,2-Dichloroethane	1	2	0
Dibromochloromethane	1	2	0
Chloroform	1	2	0
Toluene	1	2	0
Benzene	1	2	0
Acrolein	1	2	0
Acrylonitrile	1	2	0
Bis[2-chloroethyl] ether	1	2	0
Bis[2-chloroethoxy]methane	1	2	0
Bis[2-chloroisopropyl] ether	1	2	0
Chlorobenzene	1	2	0
Diethyl phthalate	1	2	0
Dimethyl phthalate	1	2	0
1,2-Diphenylhydrazine	1	2	0
Ethylbenzene	1	2	0
Fluoranthene	1	2	0
Hexachlorocyclopentadiene	1	2	0
Hexachlorobutadiene	1	2	0
Hexachloroethane	1	2	0
Isophorone	1	2	0
Methylene chloride	1	2	0
N-Nitrosodi-N-propylamine	1	2	0
N-Nitrosodiphenylamine	1	2	0
Nitrobenzene	1	2	0
Tetrachloroethylene	1	2	0
1,1-Dichloroethylene	1	2	0
1,1,1-Trichloroethane	1	2	0
1,1,2-Trichloroethane	1	2	0
1,1,2,2-Tetrachloroethane	1	2	0

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES CA0024040.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers NPDES permit CA0024040 for the ANCHOR BAY WWTF in Anchor Bay, CA, held by Mendocino County Water Works District No. 2, with permit status listed as administratively continued. The page lists 102 pollutants on file, 101 under a numeric limit, 101 with a violation of any kind, and 6 with an effluent exceedance.