MARYLAND WATER SERVICE, INC.

NPDES permit MD0022748 · Minor POTW · effective, expires 2028-05-31 · 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
4required values missing, on 1 form(s)
1of 22 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, suspended percent removal (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 (37)

OutfallParameterStatisticLimitMonths
001TurbidityMO AVG report only all year
001Oxygen, dissolved [DO]INST MIN >= 5 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 30 mg/L all year
001BOD, 5-day, 20 deg. CMX WK AV <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 113 lb/d all year
001BOD, 5-day, 20 deg. CMX WK AV <= 169 lb/d all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMX MO AV <= 90 mg/L all year
001Solids, total suspendedMX MO AV <= 338 lb/d all year
001Solids, total suspendedMO TOTAL report only all year
001Solids, total suspendedANNL MAX report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]CUM TOTL report only all year
001Nitrogen, total [as N]MO TOTAL report only all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, ammonia 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]CUM TOTL report only all year
001Phosphorus, total [as P]MO TOTAL report only all year
001Phosphate, ortho [as P]MO AVG report only all year
001BenzidineQRTR AVG report only all year
001Chlordane [tech mix. and metabolites]QRTR AVG report only all year
001ToxapheneQRTR AVG report only all year
001HexachlorobenzeneQRTR 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
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
001BOD, 5-day, percent removalMINIMUM >= 85 % all year
001Solids, suspended percent removalMINIMUM >= 65 % all year
001Flow, totalMO TOTAL report only all year
101BOD, 5-day, 20 deg. CMO AVG report only all year
101Solids, total suspendedMO 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