Rocky Gap State Park WWTP — NPDES permit MD0051667: limits, due date and EPA's record

Sewerage Systems, Cumberland, Maryland. NPDES permit MD0051667, in force until May 31, 2030. Last 12 months: no values over a limit, 22 required values missing, 2 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Limits in force (71)

Parameter	Statistic	Limit	Months	Outfall
Temperature, water deg. fahrenheit	maximum	report only (deg F)	all year	001
Temperature, water deg. fahrenheit	maximum	report only (deg F)	Apr–Nov	001
Temperature, water deg. fahrenheit	maximum	report only (deg F)	Apr–Nov	001
Oxygen, dissolved [DO]	instantaneous minimum	≥ 5 mg/L	all year	001
Oxygen, dissolved [DO]	daily average minimum	≥ 6 mg/L	all year	001
BOD, 5-day, 20 deg. C	maximum monthly average	≤ 16 mg/L	all year	001
BOD, 5-day, 20 deg. C	maximum weekly average	≤ 24 mg/L	all year	001
BOD, 5-day, 20 deg. C	maximum monthly average	≤ 20 lb/d	all year	001
BOD, 5-day, 20 deg. C	maximum weekly average	≤ 30 lb/d	all year	001
pH	minimum	≥ 6.5 SU	all year	001
pH	maximum	≤ 8.5 SU	all year	001
Solids, total suspended	maximum monthly average	≤ 16 mg/L	all year	001
Solids, total suspended	maximum weekly average	≤ 24 mg/L	all year	001
Solids, total suspended	maximum monthly average	≤ 20 lb/d	all year	001
Solids, total suspended	annual maximum	≤ 17800 lb/yr	all year	001
Solids, total suspended	monthly total	report only (lb/mo)	all year	001
Solids, total suspended	maximum weekly average	≤ 30 lb/d	all year	001
Nitrogen, total [as N]	monthly average	report only (mg/L)	all year	001
Nitrogen, total [as N]	monthly average	report only (mg/L)	all year	001
Nitrogen, total [as N]	monthly average	report only (mg/L)	all year	001
Nitrogen, total [as N]	monthly total	report only (lb/mo)	all year	001
Nitrogen, total [as N]	monthly total	≤ 3276 lb/yr	all year	001
Nitrogen, organic total [as N]	monthly average	report only (mg/L)	all year	001
Nitrogen, ammonia total [as N]	maximum monthly average	≤ 4.9 mg/L	May–Oct	001
Nitrogen, ammonia total [as N]	maximum monthly average	≤ 7 mg/L	Jan, Feb, Mar, Apr, Nov, Dec	001
Nitrogen, ammonia total [as N]	monthly average	report only (mg/L)	all year	001
Nitrogen, ammonia total [as N]	maximum monthly average	≤ 6.1 lb/d	May–Oct	001
Nitrogen, ammonia total [as N]	maximum monthly average	≤ 8.8 lb/d	Jan, Feb, Mar, Apr, Nov, Dec	001
Nitrogen, Kjeldahl, total [as N]	monthly average	report only (mg/L)	all year	001
Nitrite + Nitrate total [as N]	monthly average	report only (mg/L)	all year	001
Phosphorus, total [as P]	monthly average	report only (mg/L)	all year	001
Phosphorus, total [as P]	monthly average	report only (mg/L)	all year	001
Phosphorus, total [as P]	monthly average	report only (mg/L)	all year	001
Phosphorus, total [as P]	annual maximum	≤ 457 lb/yr	all year	001
Phosphorus, total [as P]	monthly total	report only (lb/mo)	all year	001
Sulfate, dissolved [as SO4]	monthly average	report only (mg/L)	all year	001
Phosphate, ortho [as P]	monthly average	report only (mg/L)	all year	001
Acrylonitrile	monthly average	report only (mg/L)	all year	001
Benzo[b]fluoranthene	monthly average	report only (mg/L)	all year	001
Benzo[k]fluoranthene	monthly average	report only (mg/L)	all year	001
Benzo[a]pyrene	monthly average	report only (mg/L)	all year	001
Chrysene	monthly average	report only (mg/L)	all year	001
1,2-Diphenylhydrazine	monthly average	report only (mg/L)	all year	001
Indeno[1,2,3-cd]pyrene	monthly average	report only (mg/L)	all year	001
N-Nitrosodi-N-propylamine	monthly average	report only (mg/L)	all year	001
N-Nitrosodimethylamine [NDMA]	monthly average	report only (mg/L)	all year	001
Benzo[a]anthracene	monthly average	report only (mg/L)	all year	001
Dibenz[a,h]anthracene	monthly average	report only (mg/L)	all year	001
2,3,7,8-Tetrachlorodibenzo-p-dioxin	quarterly average	report only (mg/L)	all year	001
Di[2-ethylhexyl] phthalate [DEHP]	monthly average	report only (mg/L)	all year	001
Benzidine	monthly average	report only (mg/L)	all year	001
4,4'-DDT	monthly average	report only (mg/L)	all year	001
4,4'-DDD	monthly average	report only (mg/L)	all year	001
4,4'-DDE	monthly average	report only (mg/L)	all year	001
Aldrin	monthly average	report only (mg/L)	all year	001
Chlordane [tech mix. and metabolites]	monthly average	report only (mg/L)	all year	001
Toxaphene	monthly average	report only (mg/L)	all year	001
Heptachlor	monthly average	report only (mg/L)	all year	001
Heptachlor epoxide	monthly average	report only (mg/L)	all year	001
Hexachlorobenzene	monthly average	report only (mg/L)	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Chlorine, total residual	maximum	≤ .055 mg/L	all year	001
E. coli	maximum monthly geometric mean	≤ 126 MPN/100mL	all year	001
Solids, total dissolved [TDS]	quarterly average	report only (mg/L)	all year	001
BOD, 5-day, percent removal	minimum	≥ 85 %	all year	001
Solids, suspended percent removal	minimum	≥ 85 %	all year	001
Flow, total	monthly total	report only (Mgal/mo)	all year	001
Chloride, dissolved [as Cl]	monthly average	report only (mg/L)	all year	001
BOD, 5-day, 20 deg. C	monthly average	report only (mg/L)	all year	101
Solids, total suspended	monthly average	report only (mg/L)	all year	101

New limits from Dec 1, 2026

Parameter	New limit	New or tighter	Median, last 12 months	× new limit
Nitrogen, ammonia total [as N], maximum monthly average	2.2 mg/L (May–Oct)	tighter	0 mg/L (5 values)	0×
Nitrogen, ammonia total [as N], maximum monthly average	2.8 lb/d (May–Oct)	tighter	0 lb/d (5 values)	0×
Nitrogen, ammonia total [as N], maximum monthly average	3.8 mg/L (Jan, Feb, Mar, Apr, Nov, Dec)	tighter	0 mg/L (6 values)	0×
Nitrogen, ammonia total [as N], maximum monthly average	4.8 lb/d (Jan, Feb, Mar, Apr, Nov, Dec)	tighter	0 lb/d (6 values)	0×

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/MD0051667 · MCP: https://passage-data.com/mcp