Ferndale, City of

NPDES permit CA0022721 · Minor POTW · expired, expires 2023-12-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2023-12-31 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

9values over a limit
0required values missing, on 0 form(s)
0of 21 forms filed late

Last period with anything received: 2026-06-30. Most often over: 96Hr Acute Ceriodaphn. Dubia % Srv (2), %Surv Static Renewal 96Hr Oncorhynchus mykiss (2), Solids, suspended percent removal (2).

Reporting

Reports are due about 32 days after each monitoring period ends (the most common figure among CA permits in EPA's filings — check your permit).

Limits in force (50)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeINST MAX report only all year
001Specific conductanceDAILY MX report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 15 mg/L all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMO AVG <= 10 mg/L all year
001Solids, total suspendedWKLY AVG <= 15 mg/L all year
001Solids, settleableMO AVG <= .1 mL/L all year
001Solids, settleableDAILY MX <= .2 mL/L all year
001Nitrogen, total [as N]MO AVG <= 10 mg/L all year
001Nitrogen, organic total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]DAILY MX <= 1 mg/L all year
001Nitrogen, ammonia, tot unionized [as N]DAILY MX report only all year
001Nitrogen, nitrite total [as N]DAILY MX report only all year
001Nitrogen, nitrate total [as N]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Discharge flow as % of stream flowDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Solids, total dissolvedDAILY MX report only all year
001Coliform, total general3G <= 23 MPN/100mL all year
001Coliform, total generalMW <= 240 MPN/100mL all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001%Effect Static 4 Day Chronic Raphidocelis subcapitataMO MED report only all year
001%Effect Static Renewal 96Hr Acute Ceriodaphnia dubiaMO MED report only all year
001%Effect Static Renewal 96Hr Acute Oncorhynchus mykissMO MED report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO MED report only all year
001%Effect Static Renewal 7Day Chronic Pimephales promelasMO MED report only all year
001Pass/Fail Static 4 Day Chronic Raphidocelis subcapitataMO MED report only all year
001Pass/Fail Static 4 Day Chronic Raphidocelis subcapitataDAILY MX report only all year
001Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubiaMO MED report only all year
001Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubiaDAILY MX report only all year
001Pass/Fail Static Renewal 96Hr Acute Oncorhynchus mykissMO MED report only all year
001Pass/Fail Static Renewal 96Hr Acute Oncorhynchus mykissDAILY MX report only all year
001Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO MED report only all year
001Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MX report only all year
001Pass/Fail Static Renewal 7Day Chronic Pimephales promelasMO MED report only all year
001Pass/Fail Static Renewal 7Day Chronic Pimephales promelasDAILY MX report only all year
00196Hr Acute Ceriodaphn. Dubia % SrvMINIMUM >= 70 % survival all year
00196Hr Acute Ceriodaphn. Dubia % SrvBA >= 90 % survival all year
001%Surv Static Renewal 96Hr Oncorhynchus mykissMINIMUM >= 70 % survival all year
001%Surv Static Renewal 96Hr Oncorhynchus mykissBA >= 90 % survival all year
INFBOD, 5-day, 20 deg. CDAILY MX report only all year
INFSolids, total suspendedDAILY MX report only all year
INFFlow, in conduit or thru treatment plantMO AVG report only all year
INFFlow, in conduit or thru treatment plantDAILY MX report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states