Clean Water Act discharge permit · NPDES CA0022713

ARCATA WWTF, Arcata, CA: NPDES CA0022713 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
147Pollutants under a numeric limit
19Pollutants with an effluent exceedance

ARCATA WWTF, held by Arcata, City of, holds NPDES permit CA0022713, which discharges to Humboldt Bay And Arcata Marsh Wildlife Sanctuary. EPA’s file records it issued June 7, 2012 and expiring July 31, 2017. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	ARCATA WWTF
Permittee as filed	Arcata, City of
NPDES ID	CA0022713
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	June 7, 2012
Expiration date	July 31, 2017
Address	Arcata, CA 95521
Receiving water	Humboldt Bay and Arcata Marsh Wildlife Sanctuary
Subwatershed	Humboldt Bay (HUC 180101020605)
SIC	4952 – Sewerage Systems
Other EPA IDs (FRS)	RCRA handler CAL000068060

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

155Pollutants on file
147Under a numeric limit
146With a violation of any kind
19With 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 155 are shown.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Solids, total suspended	16	238	106	April 30, 2026	430% over the limit
Cyanide, total [as CN]	4	96	96	June 30, 2026	621% over the limit
pH	6	72	58	August 31, 2018
Copper, total recoverable	6	43	42	June 30, 2025	293% over the limit
BOD, 5-day, 20 deg. C	16	182	35	April 30, 2025	860% over the limit
Flow, in conduit or thru treatment plant	8	45	25	March 31, 2000	88,465% over the limit
Solids, suspended percent removal	3	30	25	December 31, 2023	65% over the limit
Dichlorobromomethane	3	25	25	December 31, 2016	918% over the limit
BOD, 5-day, percent removal	3	25	21	April 30, 2025	300% over the limit
Chlorine, total residual	4	30	14	February 28, 2023	14,850% over the limit
Cyanide, total recoverable	0	10	9	September 30, 2009	820% over the limit
Solids, settleable	6	20	6	September 30, 2025	900% over the limit
Tributyltin	0	5	4	December 31, 1994	1,680% over the limit
Coliform, total general	0	5	3	July 31, 2011	596% over the limit
96Hr Acute Ceriodaphn. Dubia % Srv	4	4	2	December 31, 2024	100% over the limit
Nitrogen, ammonia total [as N]	2	2	2	March 31, 2025	673% over the limit
%Surv Static 96Hr Acute Pimphales Promelas	0	2	2	December 31, 2024	100% over the limit
Oil and grease	0	3	1	June 30, 1998	99,999% over the limit
Di[2-ethylhexyl] phthalate [DEHP]	4	1	1	June 30, 2015	6% over the limit
Coliform, fecal general	4	12	0
TU Static 48Hr Chronic Haliotis rufescens	0	7	0
Zinc, total recoverable	1	4	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
1,2-Dichloroethane	1	2	0
Bromoform	1	2	0
Dibromochloromethane	1	2	0
Chloroform	1	2	0
Toluene	1	2	0
Benzene	1	2	0
.delta.-BHC	1	2	0
Acenaphthylene	1	2	0
Acenaphthene	1	2	0
Acrolein	1	2	0
Acrylonitrile	1	2	0
Anthracene	1	2	0
Benzo[b]fluoranthene	1	2	0
Benzo[k]fluoranthene	1	2	0
Benzo[a]pyrene	1	2	0
Bis[2-chloroethyl] ether	1	2	0
Bis[2-chloroethoxy]methane	1	2	0
Bis[2-chloroisopropyl] ether	1	2	0
Butyl benzyl phthalate	1	2	0
Chlorobenzene	1	2	0
Chrysene	1	2	0
Diethyl phthalate	1	2	0
Dimethyl phthalate	1	2	0
1,2-Diphenylhydrazine	1	2	0
Endosulfan sulfate	1	2	0
.beta.-Endosulfan	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 CA0022713.

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 October 14, 2026.