Merced, City of

NPDES permit CA0079219 · Major POTW · expired, expires 2025-05-31 · 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 2025-05-31 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

0values over a limit
0required values missing, on 0 form(s)
12of 28 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 30 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (66)

OutfallParameterStatisticLimitMonths
002Temperature, water deg. centigradeINST MAX report only all year
002TurbidityMO AVG report only all year
002TurbidityDAILY MX report only all year
002Specific conductanceMO AVG report only all year
002Specific conductanceANNL AVG <= 760 umho/cm all year
002Specific conductanceANNL AVG <= 760 umho/cm all year
002Specific conductanceDAILY MX report only all year
002Oxygen, dissolved [DO]INST MIN report only all year
002BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L all year
002BOD, 5-day, 20 deg. CWKLY AVG <= 15 mg/L all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 8.5 SU all year
002Alkalinity, total [as CaCO3]DAILY MX report only all year
002Solids, total suspendedMO AVG <= 10 mg/L all year
002Solids, total suspendedWKLY AVG <= 15 mg/L all year
002Nitrogen, total [as N]MO AVG report only all year
002Nitrogen, total [as N]DAILY MX report only all year
002Nitrogen, ammonia total [as N]MO AVG <= 1.7 mg/L all year
002Nitrogen, ammonia total [as N]WKLY AVG <= 3.7 mg/L all year
002Nitrite + Nitrate total [as N]MO AVG <= 10 mg/L all year
002Nitrite + Nitrate total [as N]WKLY AVG <= 14 mg/L all year
002Phosphorus, total [as P]DAILY MX report only all year
002Carbon, dissolved organic [as C]DAILY MX report only all year
002Hardness, total [as CaCO3]DAILY MX report only all year
002Hardness, total [as CaCO3]DAILY MX report only all year
002Calcium, total recoverableDAILY MX report only all year
002Magnesium, total recoverableDAILY MX report only all year
002Sodium, total recoverableDAILY MX report only all year
002Potassium, total recoverableDAILY MX report only all year
002Chloride [as Cl]DAILY MX report only all year
002Iron, total recoverableDAILY MX report only all year
002Boron, total recoverableDAILY MX report only all year
002Copper, total recoverableMO AVG <= 7.1 ug/L all year
002Copper, total recoverableDAILY MX <= 12 ug/L all year
002Manganese, total recoverableDAILY MX report only all year
002DiazinonDAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Bicarbonate as [CaCO3]DAILY MX report only all year
002Carbonate ion [as CaCO3]DAILY MX report only all year
002HydroxideDAILY MX report only all year
002Diazinon + ChlorpyrifosMO AVG <= 1 ug/L all year
002Diazinon + ChlorpyrifosDAILY MX <= 1 ug/L all year
002Coliform, total general7C <= 2.2 MPN/100mL all year
002Coliform, total general3E <= 23 MPN/100mL all year
002Coliform, total generalINST MAX <= 240 MPN/100mL all year
002BOD, 5-day, percent removalMO AV MN >= 90 % all year
002Solids, suspended percent removalMO AV MN >= 90 % all year
002ChlorpyrifosDAILY MX report only all year
002%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMAXIMUM report only all year
002% Survival Static Renewal 96Hr Acute Pimephales promelasMINIMUM >= 70 % survival all year
002% Survival Static Renewal 96Hr Acute Pimephales promelasBA >= 90 % survival all year
002% Survival Flow Through 96Hr Acute Pimephales promelasMINIMUM >= 70 % survival all year
002% Survival Flow Through 96Hr Acute Pimephales promelasBA >= 90 % survival all year
002TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaAVERAGE report only all year
002TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaDAILY MX report only all year
INFSpecific conductanceMO AVG report only all year
INFSpecific conductanceDAILY MX report only all year
INFBOD, 5-day, 20 deg. CMO AVG report only all year
INFBOD, 5-day, 20 deg. CDAILY MX report only all year
INFpHMINIMUM report only all year
INFpHMAXIMUM report only all year
INFSolids, total suspendedMO AVG 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