Passage Data · Check a report · Use it from your AI

Somerset County Sanitary District, Inc.

Sewage treatment plant, Ewell, Maryland. NPDES permit MD0052230, in force until May 31, 2030. Last 12 months: over a limit 4 times (last October 2025), 14 required values missing, 9 of 33 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: outfall 001 form A monthly (29 values), outfall 001 form B monthly (3 values), outfall 101 form A monthly (2 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
7 values over a limit, 16 required values missing, 8 of 20 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, percent removal, monthly average minimum64.44 %≥ 85 %137%
October 2025BOD, 5-day, percent removal, monthly average minimum64.44 %≥ 85 %137%
October 2025Solids, suspended percent removal, monthly average minimum80 %≥ 85 %33%
October 2025Solids, suspended percent removal, monthly average minimum80 %≥ 85 %33%

Limits in force (34)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 16 lb/dall year001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 24 lb/dall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8.5 SUall year001
Solids, total suspendedmaximum monthly average≤ 30 mg/Lall year001
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year001
Solids, total suspendedmaximum monthly average≤ 16 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 24 lb/dall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]annual maximumreport only (lb/yr)all year001
Nitrogen, total [as N]monthly totalreport only (lb/mo)all year001
Nitrogen, total [as N]annual totalreport only (lb/yr)all year001
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]annual maximumreport only (lb/yr)all year001
Phosphorus, total [as P]monthly totalreport only (lb/mo)all year001
Phosphorus, total [as P]annual totalreport only (lb/yr)all year001
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualmaximum≤ .1 mg/Lall year001
Coliform, fecal generalmonthly median≤ 14 MPN/100mLall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Flow, totalmonthly totalreport only (MGD)all year001
Flow, totalannual totalreport only (Mgal/yr)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year101
Solids, total suspendedmonthly averagereport only (mg/L)all year101

Cited limits by parameter: Maryland's rules and the federal ones.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MD0052230 · MCP: https://passage-data.com/mcp