Maryland Environmental Service (MES)

NPDES permit MD0063207 · Major POTW · expired, expires 2024-12-31 · 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.

This permit expired on 2024-12-31 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

7values over a limit
0required values missing, on 0 form(s)
0of 23 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (3), E. coli (1), BOD, 5-day, 20 deg. C (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 (68)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 5 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 10 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMX MO AV <= 30 mg/L Jan, Feb, Mar, Nov, Dec
001BOD, 5-day, 20 deg. CMX WK AV <= 15 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMX WK AV <= 45 mg/L Jan, Feb, Mar, Nov, Dec
001BOD, 5-day, 20 deg. CMX MO AV <= 170 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMX MO AV <= 500 lb/d Jan, Feb, Mar, Nov, Dec
001BOD, 5-day, 20 deg. CMX WK AV <= 250 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMX WK AV <= 750 lb/d Jan, Feb, Mar, Nov, Dec
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 <= 30 mg/L all year
001Solids, total suspendedMX WK AV <= 45 mg/L all year
001Solids, total suspendedMX MO AV <= 500 lb/d all year
001Solids, total suspendedMO TOTAL report only all year
001Solids, total suspendedMX WK AV <= 750 lb/d all year
001Solids, total suspendedANNL MAX <= 182734 lb/yr all year
001Solids, total suspendedANNL TOT report only all year
001Nitrogen, total [as N]MX MO AV <= 3 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]MX DA AV <= 4.5 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]MX MO AV <= 50 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]MX WK AV <= 75 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]ANNL MAX <= 24353 lb/yr all year
001Nitrogen, total [as N]MO TOTAL report only all year
001Nitrogen, total [as N]ANNL TOT report only all year
001Nitrogen, total [as N]MO AVG report only Jan, Feb, Mar, Nov, Dec
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MX MO AV <= 1.9 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]MX MO AV <= 1.2 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX DA AV <= 6.4 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]MX DA AV <= 7.3 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX MO AV <= 32 lb/d Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]MX MO AV <= 20 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX DA AV <= 107 lb/d Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]MX DA AV <= 122 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
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]MO AVG report only all year
001Phosphorus, total [as P]MO TOTAL report only all year
001Phosphorus, total [as P]ANNL MAX <= 1827 lb/yr all year
001Phosphorus, total [as P]ANNL TOT report only all year
001Carbon, dissolved organic [as C]QRTR AVG report only Mar, Jun, Sep, Dec
001Cyanide, free-water plus wastewatersQRTR AVG report only Mar, Jun, Sep, Dec
001Hardness, total [as CaCO3]QRTR AVG report only Mar, Jun, Sep, Dec
001Cadmium, total [as Cd]QRTR AVG report only Mar, Jun, Sep, Dec
001Lead, total [as Pb]QRTR AVG report only Mar, Jun, Sep, Dec
001Silver, total [as Ag]QRTR AVG report only Mar, Jun, Sep, Dec
001Aluminum, total recoverableQRTR AVG report only Mar, Jun, Sep, Dec
001Selenium, total [as Se]QRTR AVG report only Mar, Jun, Sep, Dec
001Phosphate, ortho [as P]MO AVG report only all year
001AcroleinQRTR 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
001Chlorine, total residualMAXIMUM < .1 mg/L all year
001E. coliGX <= 126 MPN/100mL all year
001Polychlorinated biphenyls [PCB] pg/LQRTR AVG report only Mar, Jun, Sep, Dec
001Polychlorinated biphenyls [PCB] pg/LQT report only Mar, Jun, Sep, Dec
001Polychlorinated biphenyls [PCB] pg/LCUM TOTL report only all year
001Flow, totalTOTAL report only all year
001Flow, totalANNL TOT 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