COX CREEK WRF

NPDES permit MD0021661 · Major POTW · effective, expires 2031-07-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

1values over a limit
0required values missing, on 0 form(s)
0of 67 forms filed late

Last period with anything received: 2026-07-31. Most often over: pH (1).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (111)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 5 mg/L all year
001Oxygen, dissolved [DO]MN WK AV >= 6 mg/L Feb, Mar, Apr, May
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CMX MO AV <= 3755 lb/d all year
001BOD, 5-day, 20 deg. CMX WK AV <= 5633 lb/d all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedMX MO AV <= 3755 lb/d all year
001Solids, total suspendedMX WK AV <= 5633 lb/d all year
001Nitrogen, total [as N]CUM TOTL report only all year
001Nitrogen, total [as N]ANNL TOT report only all year
001Nitrogen, total [as N]ANNL TOT report only all year
001Nitrogen, total [as N]MO TOTAL report only all year
001Nitrogen, total [as N]CUM TOTL report only Dec
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MX MO AV <= 463 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX DA AV <= 1163 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]ANNL TOT report only all year
001Phosphorus, total [as P]ANNL TOT report only all year
001Benzo[a]pyreneQRTR AVG report only Mar, Jun, Sep, Dec
001Dibenz[a,h]anthraceneQRTR AVG report only Mar, Jun, Sep, Dec
001AldrinQRTR AVG report only Mar, Jun, Sep, Dec
001DieldrinQRTR AVG report only Mar, Jun, Sep, Dec
001ToxapheneQRTR AVG report only Mar, Jun, Sep, Dec
001HexachlorobenzeneQRTR AVG report only Mar, Jun, Sep, Dec
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Chlorine, total residualINST MAX < .039 mg/L all year
001EnterococciGX <= 35 MPN/100mL all year
001Phosphorous, in total orthophosphateMO AVG report only all year
001Polychlorinated biphenyls [PCB] pg/LQRTR AVG report only Mar, Jun, Sep, Dec
001Polychlorinated biphenyls [PCB] pg/LQRTR AVG report only Mar, Jun, Sep, Dec
001BOD, 5-day, percent removalMO AVG report only all year
001Solids, suspended percent removalMO AVG report only all year
001Flow, totalANNL TOT report only all year
001Flow, totalANNL TOT report only all year
001Flow, totalMO TOTAL report only all year
001Flow, totalMO TOTAL report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, totalMO TOTAL report only all year
101Oxygen, dissolved [DO]MO AVG report only all year
101BOD, 5-day, 20 deg. CMX MO AV <= 30 mg/L all year
101BOD, 5-day, 20 deg. CMX WK AV <= 45 mg/L all year
101pHMO AVG report only all year
101Solids, total suspendedMX MO AV <= 30 mg/L all year
101Solids, total suspendedMX WK AV <= 45 mg/L all year
101Solids, total suspendedCUM TOTL <= 1370502 lb/yr all year
101Solids, total suspendedMO TOTAL report only all year
101Nitrogen, total [as N]MO AVG report only all year
101Nitrogen, total [as N]MO TOTAL report only all year
101Nitrogen, total [as N]AVERAGE <= 3 mg/L May, Jun, Jul, Aug, Sep, Oct
101Nitrogen, total [as N]ANNL AVG <= 4 mg/L all year
101Nitrogen, total [as N]CUM TOTL <= 68484 lb/yr May, Jun, Jul, Aug, Sep, Oct
101Nitrogen, total [as N]ANNL MAX <= 182734 lb/yr all year
101Nitrogen, total [as N]MO TOTAL report only all year
101Nitrogen, total [as N]ANNL TOT report only Dec
101Nitrogen, organic total [as N]MO AVG report only all year
101Nitrogen, ammonia total [as N]MX MO AV <= 3.7 mg/L May, Jun, Jul, Aug, Sep, Oct
101Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
101Nitrogen, ammonia total [as N]MX DA AV <= 9.3 mg/L May, Jun, Jul, Aug, Sep, Oct
101Nitrogen, ammonia total [as N]MX DA AV report only Jan, Feb, Mar, Apr, Nov, Dec
101Nitrite + Nitrate total [as N]MO AVG report only all year
101Phosphorus, total [as P]ANNL AVG <= .3 mg/L all year
101Phosphorus, total [as P]AVERAGE <= .3 mg/L May, Jun, Jul, Aug, Sep, Oct
101Phosphorus, total [as P]MO AVG report only all year
101Phosphorus, total [as P]ANNL MAX <= 13705 lb/yr all year
101Phosphorus, total [as P]CUM TOTL <= 6852 lb/yr May, Jun, Jul, Aug, Sep, Oct
101Phosphate, ortho [as P]MO AVG report only all year
101Benzo[a]pyreneQRTR AVG report only Mar, Jun, Sep, Dec
101Dibenz[a,h]anthraceneQRTR AVG report only Mar, Jun, Sep, Dec
101AldrinQRTR AVG report only Mar, Jun, Sep, Dec
101DieldrinQRTR AVG report only Mar, Jun, Sep, Dec
101ToxapheneQRTR AVG report only Mar, Jun, Sep, Dec
101HexachlorobenzeneQRTR AVG report only Mar, Jun, Sep, Dec
101Flow, in conduit or thru treatment plantDAILY MX report only all year
101Flow, in conduit or thru treatment plantMO AVG report only all year
101Chlorine, total residualMAXIMUM <= .1 mg/L all year
101EnterococciMO AVG report only all year
101Polychlorinated biphenyls [PCB] pg/LANNL AVG report only Dec
101Polychlorinated biphenyls [PCB] pg/LQRTR AVG report only Mar, Jun, Sep, Dec
101Polychlorinated biphenyls [PCB] pg/LANNL TOT report only Dec
101Polychlorinated biphenyls [PCB] pg/LQRTR AVG report only Mar, Jun, Sep, Dec
101BOD, 5-day, percent removalMO AV MN >= 85 % all year
101Solids, suspended percent removalMO AV MN >= 85 % all year
101Flow, totalMO TOTAL report only all year
102Flow, in conduit or thru treatment plantDAILY MX report only all year
102Flow, in conduit or thru treatment plantMO AVG report only all year
102Flow, totalMO TOTAL report only all year
103Flow, in conduit or thru treatment plantDAILY MX report only all year
103Flow, in conduit or thru treatment plantMO AVG report only all year
103Flow, totalMO TOTAL report only all year
104BOD, 5-day, 20 deg. CMO AVG report only all year
104Solids, total suspendedMO AVG report only all year
TRADSolids, total suspendedCUM TOTL report only all year
TRADSolids, total suspendedCUM TOTL report only all year
TRADNitrogen, total [as N]CUM TOTL report only all year
TRADNitrogen, total [as N]CUM TOTL report only all year
TRADPhosphorus, total [as P]CUM TOTL report only all year
TRADPhosphorus, total [as P]CUM TOTL report only all year
TRADFlowYA 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