Somerset County Sanitary District, Inc.

NPDES permit MD0020656 · Major POTW · effective, expires 2027-04-30 · EPA's file as of 2026-09-19

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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: Nitrogen, total [as N] (3), Phosphorus, total [as P] (2), Nitrogen, ammonia total [as N] (2).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MD permits in EPA's filings — check your permit).

Limits in force (66)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 5 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 5 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMX MO AV <= 30 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMX WK AV <= 7.5 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMX WK AV <= 45 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMX MO AV <= 31 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMX MO AV <= 188 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMX WK AV <= 47 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMX WK AV <= 282 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMO TOTAL <= 1576 lb/mo May, Jun, Jul, Aug, Sep, Oct
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU 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 <= 188 lb/d all year
001Solids, total suspendedMX WK AV <= 282 lb/d all year
001Solids, total suspendedCUM TOTL <= 115122 lb/yr all year
001Solids, total suspendedMY report only all year
001Nitrogen, total [as N]MX MO AV <= 5 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]MX MO AV <= 31 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]CUM TOTL <= 15350 lb/yr all year
001Nitrogen, total [as N]MY <= 946 lb/mo May, Jun, Jul, Aug, Sep, Oct
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 AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, total [as N]MY report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MX 7D AV <= 12.4 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX MO AV <= 3.1 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX DA AV <= 10.2 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX DA AV <= 63.8 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX DA AV <= 77.6 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX MO AV <= 9.4 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX MO AV <= 19.4 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]MX MO AV <= .3 mg/L all year
001Phosphorus, total [as P]MX WK AV <= .45 mg/L all year
001Phosphorus, total [as P]MX MO AV <= 1.9 lb/d all year
001Phosphorus, total [as P]CUM TOTL <= 685 lb/yr all year
001Phosphorus, total [as P]MX WK AV <= 2.8 lb/d all year
001Phosphorus, total [as P]MY report only all year
001Phosphorus, total [as P]ANNL TOT report only all year
001Phosphorus, total [as P]ANNL TOT report only all year
001Cyanide, total [as CN]QRTR AVG report only Mar, Jun, Sep, Dec
001Cadmium, total [as Cd]QRTR AVG report only Mar, Jun, Sep, Dec
001Aluminum, total recoverableQRTR AVG report only Mar, Jun, Sep, Dec
001Lead, total recoverableQRTR AVG report only Mar, Jun, Sep, Dec
001Copper, total recoverableQRTR AVG report only Mar, Jun, Sep, Dec
001Phosphate, ortho [as P]MO AVG report only all year
0014,4'-DDTSEMI AVG report only Jun, Dec
001Chlordane [tech mix. and metabolites]SEMI AVG report only Jun, Dec
001ToxapheneSEMI AVG report only Jun, Dec
001HeptachlorSEMI AVG report only Jun, Dec
001Polychlorinated biphenyls [PCBs]SEMI AVG report only Jun, 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
001Coliform, fecal generalMO MED <= 14 MPN/100mL all year
001BOD, 5-day, percent removalMINIMUM >= 85 % all year
001Solids, suspended percent removalMINIMUM >= 85 % all year
001Flow, totalMO TOTAL report only all year
001Flow, totalANNL TOT report only all year
001Flow, totalANNL TOT 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