El Dorado, City of - Ouachita Joint Pipeline

NPDES permit AR0050296 · Major NON-POTW · expired, expires 2026-02-28 · EPA's file as of 2026-09-19

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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 2026-02-28 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

37values over a limit
5required values missing, on 1 form(s)
2of 22 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (36), BOD, carbonaceous [5 day, 20 C] (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 (73)

OutfallParameterStatisticLimitMonths
010ROxygen, dissolved [DO]MO AV MN >= 2 mg/L all year
010RpHMINIMUM >= 6 SU all year
010RpHMAXIMUM <= 9 SU all year
010RSolids, total suspendedMO AVG <= 5004 lb/d all year
010RSolids, total suspendedDAILY MX <= 7506 lb/d all year
010ROil & GreaseMO AVG <= 1668 lb/d all year
010ROil & GreaseDAILY MX <= 2502 lb/d all year
010RNitrogen, ammonia total [as N]MO AVG <= 19.4 mg/L Jan, Feb, Mar, Apr, Nov, Dec
010RNitrogen, ammonia total [as N]MO AVG <= 8 mg/L May, Jun, Jul, Aug, Sep, Oct
010RNitrogen, ammonia total [as N]DAILY MX <= 29 mg/L Jan, Feb, Mar, Apr, Nov, Dec
010RNitrogen, ammonia total [as N]DAILY MX <= 12 mg/L May, Jun, Jul, Aug, Sep, Oct
010RNitrogen, ammonia total [as N]MO AVG <= 3230.1 lb/d Jan, Feb, Mar, Apr, Nov, Dec
010RNitrogen, ammonia total [as N]MO AVG <= 1328.6 lb/d May, Jun, Jul, Aug, Sep, Oct
010RNitrogen, ammonia total [as N]DAILY MX <= 4845.1 lb/d Jan, Feb, Mar, Apr, Nov, Dec
010RNitrogen, ammonia total [as N]DAILY MX <= 1992.9 lb/d May, Jun, Jul, Aug, Sep, Oct
010RPhosphorus, total [as P]MO AVG <= 1 mg/L Jan, Feb, Mar, Apr, May, Jun, Nov, Dec
010RPhosphorus, total [as P]MO AVG <= .7 mg/L Jul, Aug, Sep, Oct
010RPhosphorus, total [as P]DAILY MX <= 2 mg/L Jan, Feb, Mar, Apr, May, Jun, Nov, Dec
010RPhosphorus, total [as P]DAILY MX <= 1.4 mg/L Jul, Aug, Sep, Oct
010RPhosphorus, total [as P]MO AVG <= 166.8 lb/d Jan, Feb, Mar, Apr, May, Jun, Nov, Dec
010RPhosphorus, total [as P]MO AVG <= 116.7 lb/d Jul, Aug, Sep, Oct
010RPhosphorus, total [as P]DAILY MX <= 333.6 lb/d Jan, Feb, Mar, Apr, May, Jun, Nov, Dec
010RPhosphorus, total [as P]DAILY MX <= 233.5 lb/d Jul, Aug, Sep, Oct
010RChloride [as Cl]MO AVG report only all year
010RChloride [as Cl]DAILY MX report only all year
010RSulfate, total [as SO4]MO AVG report only all year
010RSulfate, total [as SO4]DAILY MX report only all year
010RSelenium, total recoverableMO AVG <= 6.58 lb/d all year
010RSelenium, total recoverableDAILY MX <= 13.2 lb/d all year
010RNickel, total recoverableMO AVG <= 142.3 lb/d all year
010RNickel, total recoverableDAILY MX <= 285.52 lb/d all year
010RSilver total recoverableMO AVG <= .78 lb/d all year
010RSilver total recoverableDAILY MX <= 1.56 lb/d all year
010RZinc, total recoverableMO AVG <= 73.52 lb/d all year
010RZinc, total recoverableDAILY MX <= 147.51 lb/d all year
010RCadmium, total recoverableMO AVG <= 2.22 lb/d all year
010RCadmium, total recoverableDAILY MX <= 4.46 lb/d all year
010RLead, total recoverableMO AVG <= 3.99 lb/d all year
010RLead, total recoverableDAILY MX <= 8.01 lb/d all year
010RCopper, total recoverableMO AVG <= 8.23 lb/d all year
010RCopper, total recoverableDAILY MX <= 16.51 lb/d all year
010RChromium, hexavalent dissolved [as Cr]MO AVG <= 9.62 lb/d all year
010RChromium, hexavalent dissolved [as Cr]DAILY MX <= 19.3 lb/d all year
010RFlow, in conduit or thru treatment plantMO AVG report only all year
010RFlow, in conduit or thru treatment plantDAILY MX <= 20 MGD all year
010RChromium IIIMO AVG <= 395.16 lb/d all year
010RChromium IIIDAILY MX <= 792.86 lb/d all year
010RSolids, total dissolvedMO AVG report only all year
010RSolids, total dissolvedDAILY MX report only all year
010RMercury, total recoverableMO AVG <= .015 lb/d all year
010RMercury, total recoverableDAILY MX <= .032 lb/d all year
010RColiform, fecal general30DA GEO report only all year
010RColiform, fecal general7 DA GEO report only all year
010RCyanide, total recoverableMO AVG <= 6.84 lb/d all year
010RCyanide, total recoverableDAILY MX <= 13.73 lb/d all year
010RBOD, carbonaceous [5 day, 20 C]MO AVG <= 17.5 mg/L May, Jun, Jul, Aug, Sep, Oct
010RBOD, carbonaceous [5 day, 20 C]MO AVG <= 20.1 mg/L Jan, Feb, Mar, Apr, Nov, Dec
010RBOD, carbonaceous [5 day, 20 C]DAILY MX <= 26.3 mg/L May, Jun, Jul, Aug, Sep, Oct
010RBOD, carbonaceous [5 day, 20 C]DAILY MX <= 30.2 mg/L Jan, Feb, Mar, Apr, Nov, Dec
010RBOD, carbonaceous [5 day, 20 C]MO AVG <= 2923.2 lb/d May, Jun, Jul, Aug, Sep, Oct
010RBOD, carbonaceous [5 day, 20 C]MO AVG <= 3356.9 lb/d Jan, Feb, Mar, Apr, Nov, Dec
010RBOD, carbonaceous [5 day, 20 C]DAILY MX <= 4384.8 lb/d May, Jun, Jul, Aug, Sep, Oct
010RBOD, carbonaceous [5 day, 20 C]DAILY MX <= 5035.3 lb/d Jan, Feb, Mar, Apr, Nov, Dec
TX10Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA AVG report only all year
TX10Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7 DA AVG report only all year
TX10Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA AVG report only all year
TX10Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7 DA AVG report only all year
TX10NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA AVG report only all year
TX10NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA AVG report only all year
TX10NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA AVG report only all year
TX10NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA AVG report only all year
TX10Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia7 DA AVG report only all year
TX10Coef Of Var Static Renewal 7Day Chronic Pimephales promelas7 DA AVG 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