RISING SUN WWTP — NPDES permit MD0020265: limits, due date and EPA's record

NPDES permit MD0020265 · Minor POTW · effective, expires 2028-04-30 · EPA's file as of 2026-09-19

EPA's record, 2025-09-01 to 2026-08-31

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 (59)

Outfall	Parameter	Statistic	Limit	Months
001	Nitrogen, total [as N]	ANNL TOT	report only	all year
001	Nitrogen, total [as N]	ANNL TOT	report only	all year
001	Phosphorus, total [as P]	ANNL TOT	report only	all year
001	Phosphorus, total [as P]	ANNL TOT	report only	all year
001	Flow, total	ANNL TOT	report only	all year
001	Flow, total	ANNL TOT	report only	all year
002	Temperature, water deg. fahrenheit	MO AVG	report only	all year
002	Temperature, water deg. fahrenheit	MO MAX	report only	all year
002	Temperature, water deg. fahrenheit	MO AVG	report only	all year
002	Temperature, water deg. fahrenheit	MO MAX	report only	all year
002	Temperature, water deg. fahrenheit	MO AVG	report only	all year
002	Temperature, water deg. fahrenheit	MO MAX	report only	all year
002	Oxygen, dissolved [DO]	INST MIN	>= 5 mg/L	all year
002	Oxygen, dissolved [DO]	DLYAVMIN	>= 6 mg/L	all year
002	BOD, 5-day, 20 deg. C	MX MO AV	<= 17 mg/L	all year
002	BOD, 5-day, 20 deg. C	MX WK AV	<= 25 mg/L	all year
002	BOD, 5-day, 20 deg. C	MX MO AV	<= 69 lb/d	all year
002	BOD, 5-day, 20 deg. C	MX WK AV	<= 103 lb/d	all year
002	pH	MINIMUM	>= 6.5 SU	all year
002	pH	MAXIMUM	<= 8.5 SU	all year
002	Alkalinity, total [as CaCO3]	QRTR AVG	report only	all year
002	Solids, total suspended	MX MO AV	<= 17 mg/L	all year
002	Solids, total suspended	MX WK AV	<= 25 mg/L	all year
002	Solids, total suspended	MX MO AV	<= 69 lb/d	all year
002	Solids, total suspended	MX WK AV	<= 103 lb/d	all year
002	Nitrogen, total [as N]	MO AVG	report only	all year
002	Nitrogen, total [as N]	MY	report only	all year
002	Nitrogen, total [as N]	CUM TOTL	<= 6091 lb/yr	all year
002	Nitrogen, organic total [as N]	MO AVG	report only	all year
002	Nitrogen, ammonia total [as N]	MX MO AV	<= 1.9 mg/L	May, Jun, Jul, Aug, Sep, Oct
002	Nitrogen, ammonia total [as N]	MX MO AV	<= 6 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
002	Nitrogen, ammonia total [as N]	MX DA AV	<= 7 mg/L	May, Jun, Jul, Aug, Sep, Oct
002	Nitrogen, ammonia total [as N]	MX DA AV	<= 11 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
002	Nitrogen, ammonia total [as N]	MX MO AV	<= 8 lb/d	May, Jun, Jul, Aug, Sep, Oct
002	Nitrogen, ammonia total [as N]	MX MO AV	<= 24 lb/d	Jan, Feb, Mar, Apr, Nov, Dec
002	Nitrogen, ammonia total [as N]	MX DA AV	<= 29 lb/d	May, Jun, Jul, Aug, Sep, Oct
002	Nitrogen, ammonia total [as N]	MX DA AV	<= 46 lb/d	Jan, Feb, Mar, Apr, Nov, Dec
002	Nitrite + Nitrate total [as N]	MO AVG	report only	all year
002	Phosphorus, total [as P]	MO AVG	report only	all year
002	Phosphorus, total [as P]	CUM TOTL	<= 457 lb/yr	all year
002	Phosphorus, total [as P]	MY	report only	all year
002	Carbon, dissolved organic [as C]	QRTR AVG	report only	all year
002	Aluminum, total [as Al]	QRTR AVG	report only	all year
002	Phosphate, ortho [as P]	MO AVG	report only	all year
002	Phosphate, ortho [as P]	MO AVG	report only	all year
002	4,4'-DDT	QRTR AVG	report only	all year
002	Toxaphene	QRTR AVG	report only	all year
002	Heptachlor	QRTR AVG	report only	all year
002	Heptachlor epoxide	QRTR AVG	report only	all year
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	E. coli	GX	<= 126 MPN/100mL	all year
002	BOD, 5-day, percent removal	MO AVG	report only	all year
002	Solids, suspended percent removal	MO AVG	report only	all year
002	Flow, total	TOTAL	report only	all year
002	Toxicity, Acute	QRTR AVG	report only	all year
002	Toxicity, Chronic	QRTR AVG	report only	all year
101	BOD, 5-day, 20 deg. C	ANNL AVG	report only	all year
101	Solids, total suspended	ANNL AVG	report only	all year