SWAN POINT

NPDES permit MD0057525 · Minor NON-POTW · effective, expires 2030-01-31 · 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

0values over a limit
0required values missing, on 0 form(s)
0of 55 forms filed late

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

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 (116)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 5 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 30 mg/L all year
001BOD, 5-day, 20 deg. CWKLY MAX <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 75 lb/d all year
001BOD, 5-day, 20 deg. CWKLY MAX <= 113 lb/d all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMX MO AV <= 30 mg/L all year
001Solids, total suspendedWKLY MAX <= 45 mg/L all year
001Solids, total suspendedMX MO AV <= 75 lb/d all year
001Solids, total suspendedWKLY MAX <= 113 lb/d all year
001Solids, total suspendedMO TOTAL report only all year
001Solids, total suspendedCUM TOTL <= 27410 lb/yr all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, total [as N]MX MO AV <= 10 mg/L all year
001Nitrogen, total [as N]WKLY MAX <= 15 mg/L all year
001Nitrogen, total [as N]MX MO AV <= 25 lb/d all year
001Nitrogen, total [as N]WKLY MAX <= 37.5 lb/d all year
001Nitrogen, total [as N]MO TOTAL report only all year
001Nitrogen, total [as N]MO TOTAL <= 3655 lb/yr all year
001Nitrogen, total [as N]ANNL TOT report only all year
001Nitrogen, organic total [as N]MX MO AV report only all year
001Nitrogen, ammonia total [as N]MX MO AV <= 2.9 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX MO AV report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 13.6 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX MO AV <= 7.3 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX MO AV report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 34 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, Kjeldahl, total [as N]MX MO AV report only all year
001Nitrite + Nitrate total [as N]MX MO AV report only all year
001Phosphorus, total [as P]MX MO AV <= .5 mg/L all year
001Phosphorus, total [as P]WKLY MAX <= .75 mg/L all year
001Phosphorus, total [as P]MX MO AV <= 1.25 lb/d all year
001Phosphorus, total [as P]WKLY MAX <= 1.88 lb/d all year
001Phosphorus, total [as P]MO TOTAL report only all year
001Phosphorus, total [as P]CUM TOTL <= 274 lb/yr all year
001Phosphorus, total [as P]ANNL TOT report only all year
001Phosphate, ortho [as P]MO AVG 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
001Chlorine, total residualMAXIMUM <= .1 mg/L all year
001Coliform, fecal generalMO AVG report only Jan, Feb, Mar, Nov, Dec
001Coliform, fecal generalMAXIMUM <= 14 MPN/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001Polychlorinated biphenyls [PCB] pg/LQRTR AVG report only all year
001Polychlorinated biphenyls [PCB] pg/LQT report only all year
001Polychlorinated biphenyls [PCB] pg/LANNL MAX report only all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Flow, totalMO TOTAL report only all year
001Flow, totalANNL TOT report only all year
101AOxygen, dissolved [DO]INST MIN >= 5 mg/L all year
101ABOD, 5-day, 20 deg. CMX MO AV <= 30 mg/L all year
101ABOD, 5-day, 20 deg. CMX WK AV <= 45 mg/L all year
101ABOD, 5-day, 20 deg. CMX MO AV <= 75 lb/d all year
101ABOD, 5-day, 20 deg. CMX WK AV <= 113 lb/d all year
101ApHMINIMUM >= 6.5 SU all year
101ApHMAXIMUM <= 8.5 SU all year
101ASolids, total suspendedMX MO AV <= 30 mg/L all year
101ASolids, total suspendedMX WK AV <= 45 mg/L all year
101ASolids, total suspendedMX MO AV <= 75 lb/d all year
101ASolids, total suspendedMX WK AV <= 113 lb/d all year
101ANitrogen, total [as N]MX MO AV <= 10 mg/L all year
101ANitrogen, total [as N]MX WK AV <= 15 mg/L all year
101ANitrogen, total [as N]MX MO AV <= 25 lb/d all year
101ANitrogen, total [as N]MX WK AV <= 37.5 lb/d all year
101ANitrogen, total [as N]MO TOTAL report only all year
101ANitrogen, total [as N]CUM TOTL report only all year
101ANitrogen, organic total [as N]MO AVG report only all year
101ANitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
101ANitrogen, ammonia total [as N]MX MO AV <= 2.9 mg/L May, Jun, Jul, Aug, Sep, Oct
101ANitrogen, ammonia total [as N]MX DA AV <= 13.6 mg/L May, Jun, Jul, Aug, Sep, Oct
101ANitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
101ANitrogen, ammonia total [as N]MX MO AV <= 7.3 lb/d May, Jun, Jul, Aug, Sep, Oct
101ANitrogen, ammonia total [as N]MX DA AV <= 34 lb/d May, Jun, Jul, Aug, Sep, Oct
101ANitrite + Nitrate total [as N]MO AVG report only all year
101APhosphorus, total [as P]MX MO AV <= .5 mg/L all year
101APhosphorus, total [as P]MX WK AV <= .75 mg/L all year
101APhosphorus, total [as P]MX MO AV <= 1.3 lb/d all year
101APhosphorus, total [as P]MO TOTAL report only all year
101APhosphorus, total [as P]ANNL TOT report only all year
101APhosphorus, total [as P]MX WK AV <= 1.9 lb/d all year
101APhosphate, ortho [as P]MO AVG report only all year
101APolychlorinated biphenyls [PCBs]QRTR AVG report only Mar, Jun, Sep, Dec
101APolychlorinated biphenyls [PCBs]CUM TOTL report only Mar, Jun, Sep, Dec
101APolychlorinated biphenyls [PCBs]QT report only Mar, Jun, Sep, Dec
101AFlow, in conduit or thru treatment plantMO AVG report only all year
101AFlow, in conduit or thru treatment plantDAILY MX report only all year
101AChlorine, total residualDAILY MX <= .1 mg/L all year
101AColiform, fecal generalGX <= 14 MPN/100mL all year
101ABOD, 5-day, percent removalMO AVG report only all year
101ASolids, suspended percent removalMO AVG report only all year
101AFlow, totalMO TOTAL report only all year
102AOxygen, dissolved [DO]INST MIN report only all year
102ABOD, 5-day, 20 deg. CMO AVG report only all year
102ASolids, total suspendedMO AVG report only all year
102ANitrogen, total [as N]MO AVG report only all year
102ANitrogen, organic total [as N]MO AVG report only all year
102ANitrogen, ammonia total [as N]MO AVG report only all year
102ANitrogen, Kjeldahl, total [as N]MO AVG report only all year
102ANitrite + Nitrate total [as N]MO AVG report only all year
102APhosphorus, total [as P]MO AVG report only all year
102AColiform, fecal general90TH % report only Apr, May, Jun, Jul, Aug, Sep, Oct
102AColiform, fecal generalMO MED report only Apr, May, Jun, Jul, Aug, Sep, Oct
102AColiform, fecal generalMO MED report only Jan, Feb, Mar, Nov, Dec
201BOD, 5-day, 20 deg. CMO AVG report only all year
201Solids, total suspendedMO AVG report only all year
TRADSolids, total suspendedMO TOTAL report only all year
TRADSolids, total suspendedMO TOTAL report only all year
TRADNitrogen, total [as N]MO TOTAL report only all year
TRADNitrogen, total [as N]MO TOTAL report only all year
TRADPhosphorus, total [as P]MO TOTAL report only all year
TRADPhosphorus, total [as P]MO TOTAL 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