Velarion Records

Clean Water Act discharge permit · NPDES CA0078034

WILLOWS WWTP, Willows, CA: NPDES CA0078034 discharge permit, effluent exceedances, inspections, penalties

WILLOWS WWTP, held by Willows, City of, holds NPDES permit CA0078034, which discharges to Agricultural Drain C, Gcid Lateral 26-2. EPA’s file records it issued October 13, 2011 and expiring December 1, 2016. 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 filedWILLOWS WWTP
Permittee as filedWillows, City of
NPDES IDCA0078034
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedOctober 13, 2011
Expiration dateDecember 1, 2016
AddressWillows, CA 95988
Receiving waterAgricultural Drain C, GCID Lateral 26-2
SubwatershedNorth Fork Logan Creek (HUC 180201040502)
SIC4952 – Sewerage Systems

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

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 216 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Chlorine, total residual43636August 31, 201799,999% over the limit
Coliform, total general42319November 30, 202199,999% over the limit
BOD, 5-day, 20 deg. C121818March 31, 201199,999% over the limit
Nitrogen, ammonia total [as N]161612March 31, 2007250% over the limit
Solids, settleable077May 31, 20047,400% over the limit
Solids, total suspended1255December 31, 20064,664% over the limit
Dichlorobromomethane844November 30, 2016873% over the limit
pH663November 30, 2007
Specific conductance633December 31, 201419% over the limit
Nitrogen, nitrate total [as N]422November 30, 2016139% over the limit
Dibromochloromethane811March 31, 20122% over the limit
TU Static Renewal 7-Day Chronic Ceriodaphnia dubia8110
TU Static Renewal 7-Day Chronic Pimphales promelas8110
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)890
Temperature, water deg. centigrade030
2,3,7,8-Tetrachlorodibenzo-p-dioxin620
1,2,3,4,6,7,8,9-Octachlorodibenzo-p-dioxin420
1,2,3,7,8-Pentachlorodibenzo-p-dioxin420
1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin420
1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin420
1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin420
1,2,3,7,8-Pentachlorodibenzofuran420
2,3,4,7,8-Pentachlorodibenzofuran420
1,2,3,4,7,8-Hexachlorodibenzofuran420
1,2,3,6,7,8-Hexachlorodibenzofuran420
1,2,3,7,8,9-Hexachlorodibenzofuran420
2,3,4,6,7,8-Hexachlorodibenzofuran420
1,2,3,4,6,7,8-Heptachlorodibenzofuran420
1,2,3,4,7,8,9-Heptachlorodibenzofuran420
1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin420
2,3,7,8-Tetrachlorodibenzofuran420
1,2,3,4,6,7,8,9-Octachlorodibenzofuran420
TCDD equivalents420
BOD, 5-day, percent removal220
Solids, suspended percent removal220
%Surv Static 96Hr Acute Pimphales Promelas020
Static 96Hr Chronic Selen. Capricornutum020
Arsenic, total recoverable210
Selenium, total recoverable210
Nickel, total recoverable210
Silver total recoverable210
Zinc, total recoverable210
Lead, total recoverable210
Antimony, total recoverable210
Chloroform210
Toluene210
.delta.-BHC210
Solids, total dissolved210
Mercury, total recoverable210
Chromium, hexavalent tot recoverable010
Nitrogen, ammonia, tot unionized [as N]800
Flow, in conduit or thru treatment plant600
Turbidity400
% Survival Static Renewal 96Hr Acute Pimephales promelas400
Hardness, total [as CaCO3]300
Temperature, water deg. fahrenheit200
Alkalinity, total [as CaCO3]200
Nitrogen, nitrite total [as N]200
Phosphorus, total [as P]200
Cyanide, total [as CN]200

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES CA0078034.

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.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, CA0078034.

Start the watch

How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID CA0078034 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

The Pay Desk is the free weekly executive pay briefing — one company at a time, every number traceable to a public filing.
You’ll confirm on The Pay Desk’s sign-up page.