Elkton, City of — NPDES permit SD0020788: limits, due date and EPA's record

NPDES permit SD0020788 · Minor POTW · administratively continued, expires 2024-06-30 · EPA's file as of 2026-09-19

This permit expired on 2024-06-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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 (42)

Outfall	Parameter	Statistic	Limit	Months
002	Temperature, water deg. centigrade	30DA AVG	report only	all year
002	Temperature, water deg. centigrade	DAILY MX	report only	all year
002	Flow rate	30DA AVG	report only	all year
002	Flow rate	DAILY MX	report only	all year
002	BOD, 5-day, 20 deg. C	30DA AVG	<= 30 mg/L	all year
002	BOD, 5-day, 20 deg. C	MX 7D AV	<= 45 mg/L	all year
002	pH	DAILY MN	>= 6 SU	all year
002	pH	DAILY MX	<= 9 SU	all year
002	Solids, total suspended	30DA AVG	<= 90 mg/L	all year
002	Solids, total suspended	MX 7D AV	<= 135 mg/L	all year
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 10.9 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 4.4 mg/L	May, Jun, Jul, Aug, Sep, Oct
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 10.9 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 6.9 mg/L	May, Jun, Jul, Aug, Sep, Oct
002	Nitrogen, nitrate total [as N]	30DA AVG	report only	all year
002	Nitrogen, nitrate total [as N]	DAILY MX	report only	all year
002	E. coli, colony forming units [CFU]	30DA GEO	<= 630 #/100mL	May, Jun, Jul, Aug, Sep
002	E. coli, colony forming units [CFU]	DAILY MX	<= 1178 #/100mL	May, Jun, Jul, Aug, Sep
002	Flowing, Receiving Stream	DAILY MX	report only	all year
003	Temperature, water deg. centigrade	30DA AVG	report only	all year
003	Temperature, water deg. centigrade	DAILY MX	report only	all year
003	Flow rate	30DA AVG	report only	all year
003	Flow rate	DAILY MX	<= .323 MGD	all year
003	BOD, 5-day, 20 deg. C	30DA AVG	<= 30 mg/L	all year
003	BOD, 5-day, 20 deg. C	MX 7D AV	<= 45 mg/L	all year
003	pH	DAILY MN	>= 6 SU	all year
003	pH	DAILY MX	<= 9 SU	all year
003	Solids, total suspended	30DA AVG	<= 90 mg/L	all year
003	Solids, total suspended	MX 7D AV	<= 135 mg/L	all year
003	Nitrogen, total [as N]	DAILY MX	report only	all year
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 4.4 mg/L	May, Jun, Jul, Aug, Sep, Oct
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 10.9 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 6.9 mg/L	May, Jun, Jul, Aug, Sep, Oct
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 10.9 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
003	Phosphorus, total [as P]	DAILY MX	report only	all year
003	E. coli, colony forming units [CFU]	30DA GEO	<= 630 #/100mL	May, Jun, Jul, Aug, Sep
003	E. coli, colony forming units [CFU]	DAILY MX	<= 1178 #/100mL	May, Jun, Jul, Aug, Sep
003	Flow, total	MO TOTAL	report only	all year
003	Flowing, Receiving Stream	DAILY MX	report only	all year
003	Toxicity [acute], Ceriodaphnia dubia	DAILY MX	report only	all year
003	Toxicity [acute], Pimephales promelas [Fathead Minnow]	DAILY MX	report only	all year
003	Duration of discharge	MO TOTAL	report only	all year