El Dorado, City of - North Plant

NPDES permit AR0033936 · Major POTW · effective, expires 2028-12-31 · 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.

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

10values over a limit
5required values missing, on 1 form(s)
4of 77 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (7), Nitrogen, ammonia total [as N] (2), Coliform, fecal general (1).

Reporting

Reports are due about 25 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (219)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigrade7 DA AVG report only Apr, May
001Oxygen, dissolved [DO]MO AV MN >= 8 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Oxygen, dissolved [DO]MO AV MN >= 5 mg/L May, Jun, Jul, Aug, Sep, Oct
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 15 mg/L all year
001Solids, total suspended7 DA AVG <= 22.5 mg/L all year
001Solids, total suspendedMO AVG <= 625.5 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 13.3 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 3.18 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 3.25 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 2.46 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 2.51 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 3.62 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 3.7 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 2.8 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 2.86 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 7.95 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 6.8 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 2.4 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 9.1 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 4.12 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 4.21 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 11.7 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 6.2 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 6.3 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 4.68 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 4.79 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 5.33 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 5 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 13.5 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 6.1 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 7 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 7.2 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 10.3 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 13.3 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.95 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 6.2 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 6.3 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 9.1 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 7 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.2 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.95 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 13.5 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]7 DA AVG <= 6.1 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]7 DA AVG <= 9.1 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 10.3 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 11.7 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 6.2 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 6.3 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 11.7 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 13.3 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 13.5 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]7 DA AVG <= 6.1 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]7 DA AVG <= 7 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.2 mg/L May
001Nitrogen, ammonia total [as N]7 DA AVG <= 10.3 mg/L Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 7.5 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 554.6 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 312.8 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 132.61 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 135.53 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 102.58 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 104.67 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 150.95 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 154.29 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 116.76 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 119.26 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 331.5 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 312.8 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 283.6 lb/d Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 100.1 lb/d Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 379.5 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 312.8 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 171.8 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 175.56 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 487.9 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 312.8 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 258.5 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 262.7 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 195.16 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 199.74 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 222.26 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 208.5 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 563 lb/d Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 254.4 lb/d Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 291.9 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 300.24 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 429.5 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 312.8 lb/d May
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]7 DA AVG report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Chloride [as Cl]MO AVG report only all year
001Chloride [as Cl]7 DA AVG report only all year
001Chloride [as Cl]MO AVG report only all year
001Lead, total recoverableMO AVG <= 3.8 ug/L all year
001Lead, total recoverable7 DA AVG <= 7.6 ug/L all year
001Lead, total recoverableMO AVG <= .16 lb/d 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 dissolvedMO AVG report only all year
001Solids, total dissolved7 DA AVG report only all year
001Solids, total dissolvedMO AVG report only all year
001Mercury, total recoverableMO AVG report only all year
001Mercury, total recoverable7 DA AVG report only all year
001Mercury, total recoverableMO AVG report only all year
001Coliform, fecal general30DA GEO <= 1000 #/100mL all year
001Coliform, fecal general7 DA GEO <= 2000 #/100mL all year
001OverflowsMO TOTAL report only all year
001Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 15 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 417 lb/d all year
001SulfateMO AVG report only all year
001Sulfate7 DA AVG report only all year
001SulfateMO AVG report only all year
010NOxygen, dissolved [DO]INST MIN report only all year
010NpHMINIMUM >= 6 SU all year
010NpHMAXIMUM <= 9 SU all year
010NSolids, total suspendedMO AVG <= 30 mg/L all year
010NSolids, total suspendedDAILY MX <= 45 mg/L all year
010NSolids, total suspendedMO AVG <= 1251 lb/d all year
010NSolids, total suspendedDAILY MX <= 1876.5 lb/d all year
010NOil & GreaseMO AVG <= 417 lb/d all year
010NOil & GreaseDAILY MX <= 625.5 lb/d all year
010NNitrogen, ammonia total [as N]MO AVG <= 354.4 lb/d May, Jun, Jul, Aug, Sep, Oct
010NNitrogen, ammonia total [as N]MO AVG <= 1146.7 lb/d Jan, Feb, Mar, Apr, Nov, Dec
010NNitrogen, ammonia total [as N]DAILY MX <= 446 lb/d May, Jun, Jul, Aug, Sep, Oct
010NNitrogen, ammonia total [as N]DAILY MX <= 1634 lb/d Jan, Feb, Mar, Apr, Nov, Dec
010NPhosphorus, total [as P]MO AVG report only all year
010NPhosphorus, total [as P]DAILY MX report only all year
010NChloride [as Cl]MO AVG report only all year
010NChloride [as Cl]DAILY MX report only all year
010NSelenium, total recoverableMO AVG <= 1.65 lb/d all year
010NSelenium, total recoverableDAILY MX <= 3.3 lb/d all year
010NNickel, total recoverableMO AVG <= 35.58 lb/d all year
010NNickel, total recoverableDAILY MX <= 71.38 lb/d all year
010NSilver total recoverableMO AVG <= .2 lb/d all year
010NSilver total recoverableDAILY MX <= .39 lb/d all year
010NZinc, total recoverableMO AVG <= 18.38 lb/d all year
010NZinc, total recoverableDAILY MX <= 36.88 lb/d all year
010NCadmium, total recoverableMO AVG <= .56 lb/d all year
010NCadmium, total recoverableDAILY MX <= 1.12 lb/d all year
010NLead, total recoverableMO AVG <= 1 lb/d all year
010NLead, total recoverableDAILY MX <= 2 lb/d all year
010NCopper, total recoverableMO AVG <= 2.06 lb/d all year
010NCopper, total recoverableDAILY MX <= 4.13 lb/d all year
010NChromium, hexavalent dissolved [as Cr]MO AVG <= 2.41 lb/d all year
010NChromium, hexavalent dissolved [as Cr]DAILY MX <= 4.83 lb/d all year
010NChromium, trivalent total recoverableMO AVG <= 98.79 lb/d all year
010NChromium, trivalent total recoverableDAILY MX <= 198.22 lb/d all year
010NFlow, in conduit or thru treatment plantMO AVG report only all year
010NFlow, in conduit or thru treatment plantDAILY MX <= 5 MGD all year
010NSolids, total dissolvedMO AVG report only all year
010NSolids, total dissolvedDAILY MX report only all year
010NMercury, total recoverableDAILY MX < .19 ug/L all year
010NColiform, fecal general30DA GEO <= 200 #/100mL May, Jun, Jul, Aug, Sep
010NColiform, fecal general30DA GEO <= 1000 #/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
010NColiform, fecal general7 DA GEO <= 400 #/100mL May, Jun, Jul, Aug, Sep
010NColiform, fecal general7 DA GEO <= 2000 #/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
010NCyanide, total recoverableMO AVG <= 1.71 lb/d all year
010NCyanide, total recoverableDAILY MX <= 3.43 lb/d all year
010NBOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L Jan, Feb, Mar, Apr, Nov, Dec
010NBOD, carbonaceous [5 day, 20 C]MO AVG <= 22.5 mg/L May, Jun, Jul, Aug, Sep, Oct
010NBOD, carbonaceous [5 day, 20 C]DAILY MX <= 39 mg/L Jan, Feb, Mar, Apr, Nov, Dec
010NBOD, carbonaceous [5 day, 20 C]DAILY MX <= 33.8 mg/L May, Jun, Jul, Aug, Sep, Oct
010NBOD, carbonaceous [5 day, 20 C]MO AVG <= 945.3 lb/d Jan, Feb, Mar, Apr, Nov, Dec
010NBOD, carbonaceous [5 day, 20 C]MO AVG <= 799.3 lb/d May, Jun, Jul, Aug, Sep, Oct
010NBOD, carbonaceous [5 day, 20 C]DAILY MX <= 1417.95 lb/d Jan, Feb, Mar, Apr, Nov, Dec
010NBOD, carbonaceous [5 day, 20 C]DAILY MX <= 1198.95 lb/d May, Jun, Jul, Aug, Sep, Oct
010NSulfateMO AVG report only all year
010NSulfateDAILY MX report only all year
TX1Whole effluent toxicity - retest #17 DA MIN report only all year
TX1Whole effluent toxicity - retest #27 DA MIN report only all year
TX1WET, sublethal retest #17 DA MIN report only all year
TX1WET, sublethal retest #27 DA MIN report only all year
TX1Whole Effluent Toxicity - Retest #37 DA MIN report only all year
TX1Whole Effluent Toxicity, Sub-Lethal Retest #37 DA MIN report only all year
TX1Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1Coef Of Var Static Renewal 7Day Chronic Pimephales promelas7 DA MIN report only all year
TX1NWhole effluent toxicity - retest #17 DA MIN report only all year
TX1NWhole effluent toxicity - retest #27 DA MIN report only all year
TX1NWET, sublethal retest #17 DA MIN report only all year
TX1NWET, sublethal retest #27 DA MIN report only all year
TX1NWhole Effluent Toxicity - Retest #37 DA MIN report only all year
TX1NWhole Effluent Toxicity, Sub-Lethal Retest #37 DA MIN report only all year
TX1NPass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1NPass/Fail Static Renewal 7Day Chronic Pimephales promelas7 DA MIN report only all year
TX1NLow Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1NLow Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1NNOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1NNOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1NNOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1NNOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1NCoef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1NCoef Of Var Static Renewal 7Day Chronic Pimephales promelas7 DA MIN report only all year

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