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Kent county Dept. of Water & Wastewater Services

Sewage treatment plant, Rock Hall, Maryland. NPDES permit MD0020303, in force until Jul 31, 2029. Last 12 months: over a limit 2 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (34 values), outfall 101 form A monthly (2 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
December 2025Solids, suspended percent removal, minimum76 %≥ 85 %60%
May 2026Coliform, fecal general, monthly median17 MPN/100mL≤ 14 MPN/100mL21%

Limits in force (37)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year001
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LFeb–May001
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≤ 120 lb/dall year001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 180 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≤ 120 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 180 lb/dall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly totalreport only (lb/mo)all year001
Nitrogen, total [as N]annual maximumreport 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
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]maximum monthly average≤ 1 mg/Lall year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]maximum weekly average≤ 1.5 mg/Lall year001
Phosphorus, total [as P]maximum monthly average≤ 4 lb/dall year001
Phosphorus, total [as P]monthly totalreport only (lb/mo)all year001
Phosphorus, total [as P]annual maximumreport only (lb/yr)all year001
Phosphorus, total [as P]maximum weekly average≤ 6 lb/dall 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
Phosphorous, in total orthophosphatemonthly averagereport only (mg/L)all year001
Phosphorous, in total orthophosphatemonthly averagereport only (lb/d)all year001
Coliform, fecal generalmonthly median≤ 14 MPN/100mLall year001
BOD, 5-day, percent removalminimum≥ 85 %all year001
Solids, suspended percent removalminimum≥ 85 %all year001
Flow, totalmonthly totalreport only (Mgal/mo)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.

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Your permit document is the final word. As JSON: /api/v1/permits/MD0020303 · MCP: https://passage-data.com/mcp