Aberdeen, City of — NPDES permit SD0020702: limits, due date and EPA's record

NPDES permit SD0020702 · Major POTW · administratively continued, expires 2025-12-31 · EPA's file as of 2026-09-19

This permit expired on 2025-12-31 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

Last period with anything received: 2026-08-31. Most often over: Toxicity [chronic], Ceriodaphnia dubia (1).

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 (71)

Outfall	Parameter	Statistic	Limit	Months
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	report only	all year
003	Oxygen, dissolved [DO]	DAILY MN	report only	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	BOD, 5-day, 20 deg. C	30DA AVG	report only	all year
003	pH	DAILY MN	>= 6 SU	all year
003	pH	DAILY MX	<= 9 SU	all year
003	Solids, total suspended	30DA AVG	<= 30 mg/L	all year
003	Solids, total suspended	MX 7D AV	<= 45 mg/L	all year
003	Solids, total suspended	30DA AVG	report only	all year
003	Oil & Grease	DAILY MX	<= 10 mg/L	all year
003	Nitrogen, total [as N]	DAILY MX	report only	all year
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 1 mg/L	Jan, Feb, Mar, Nov, Dec
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 1 mg/L	Apr
003	Nitrogen, ammonia total [as N]	30DA AVG	<= .5 mg/L	May, Jun, Jul, Aug, Sep
003	Nitrogen, ammonia total [as N]	30DA AVG	<= .5 mg/L	Oct
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 6.6 mg/L	Jan, Feb, Mar, Nov, Dec
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 6.1 mg/L	Apr
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 2 mg/L	May, Jun, Jul, Aug, Sep
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 4.9 mg/L	Oct
003	Nitrogen, nitrate total [as N]	DAILY MX	report only	all year
003	Phosphorus, total [as P]	DAILY MX	report only	all year
003	Cyanide, weak acid, dissociable	DAILY MX	report only	all year
003	Cyanide, weak acid, dissociable	DAILY MX	report only	all year
003	Cyanide, total [as CN]	DAILY MX	report only	all year
003	Cyanide, total [as CN]	DAILY MX	report only	all year
003	Hardness, total [as CaCO3]	DAILY MX	report only	all year
003	Hardness, total [as CaCO3]	DAILY MX	report only	all year
003	Arsenic, total [as As]	DAILY MX	report only	all year
003	Arsenic, total [as As]	DAILY MX	report only	all year
003	Beryllium, total [as Be]	DAILY MX	report only	all year
003	Beryllium, total [as Be]	DAILY MX	report only	all year
003	Cadmium, total [as Cd]	DAILY MX	report only	all year
003	Cadmium, total [as Cd]	DAILY MX	report only	all year
003	Chromium, total [as Cr]	DAILY MX	report only	all year
003	Copper, total [as Cu]	DAILY MX	report only	all year
003	Copper, total [as Cu]	DAILY MX	report only	all year
003	Lead, total [as Pb]	DAILY MX	report only	all year
003	Lead, total [as Pb]	DAILY MX	report only	all year
003	Thallium, total [as Tl]	DAILY MX	report only	all year
003	Thallium, total [as Tl]	DAILY MX	report only	all year
003	Molybdenum, total [as Mo]	DAILY MX	report only	all year
003	Molybdenum, total [as Mo]	DAILY MX	report only	all year
003	Nickel, total [as Ni]	DAILY MX	report only	all year
003	Nickel, total [as Ni]	DAILY MX	report only	all year
003	Silver, total [as Ag]	DAILY MX	report only	all year
003	Silver, total [as Ag]	DAILY MX	report only	all year
003	Zinc, total [as Zn]	DAILY MX	report only	all year
003	Zinc, total [as Zn]	DAILY MX	report only	all year
003	Antimony, total [as Sb]	DAILY MX	report only	all year
003	Antimony, total [as Sb]	DAILY MX	report only	all year
003	Aluminum, total [as Al]	DAILY MX	report only	all year
003	Aluminum, total [as Al]	DAILY MX	report only	all year
003	Selenium, total [as Se]	DAILY MX	report only	all year
003	Selenium, total [as Se]	DAILY MX	report only	all year
003	Phenols	DAILY MX	report only	all year
003	Phenols	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	Toxicity [chronic], Ceriodaphnia dubia	DAILY MX	< 1.14 tox chronic	all year
003	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	DAILY MX	< 1.14 tox chronic	all year
003	Mercury, total [as Hg]	DAILY MX	report only	all year
003	Mercury, total [as Hg]	DAILY MX	report only	all year
003	BOD, carbonaceous [5 day, 20 C]	DAILY MX	report only	all year
003	BOD, 5-day, percent removal	MO AV MN	>= 85 %	all year
003	Solids, suspended percent removal	MO AV MN	>= 85 %	all year
003	Oil and grease visual	DAILY MX	<= 0 N=0;Y=1	all year
003	Report due [yrmoda]	DAILY MX	report only	all year