Pima County - Regional Wastewater Reclamation Department — NPDES permit AZ0022250: limits, due date and EPA's record

NPDES permit AZ0022250 · Minor POTW · administratively continued, expires 2026-09-01 · EPA's file as of 2026-09-19

This permit expired on 2026-09-01 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 (the most common figure among AZ permits in EPA's filings — check your permit).

Limits in force (190)

Outfall	Parameter	Statistic	Limit	Months
001	Temperature, water deg. centigrade	DAILY MX	report only	all year
001	Oxygen, dissolved [DO]	DAILY MX	report only	all year
001	BOD, 5-day, 20 deg. C	MO AVG	<= 30 mg/L	all year
001	BOD, 5-day, 20 deg. C	WKLY AVG	<= 45 mg/L	all year
001	BOD, 5-day, 20 deg. C	DAILY MX	report only	all year
001	BOD, 5-day, 20 deg. C	MO AVG	<= 1.7 kg/d	all year
001	BOD, 5-day, 20 deg. C	WKLY AVG	<= 2.6 kg/d	all year
001	pH	MINIMUM	>= 6.5 SU	all year
001	pH	MINIMUM	report only	all year
001	pH	MAXIMUM	<= 9 SU	all year
001	pH	MAXIMUM	report only	all year
001	Solids, total suspended	MO AVG	<= 30 mg/L	all year
001	Solids, total suspended	WKLY AVG	<= 45 mg/L	all year
001	Solids, total suspended	DAILY MX	report only	all year
001	Solids, total suspended	MO AVG	<= 1.7 kg/d	all year
001	Solids, total suspended	WKLY AVG	<= 2.6 kg/d	all year
001	Oil & Grease	MO AVG	report only	all year
001	Oil & Grease	DAILY MX	report only	all year
001	Oil & Grease	DAILY MX	report only	all year
001	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
001	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
001	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
001	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
001	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
001	Phosphorus, total [as P]	DAILY MX	report only	all year
001	Cyanide, total [as CN]	DAILY MX	<= 41 ug/L	all year
001	Cyanide, total [as CN]	DAILY MX	report only	all year
001	Cyanide, total [as CN]	DAILY MX	<= 2.3 g/d	all year
001	Hardness, total [as CaCO3]	DAILY MX	report only	all year
001	Hardness, total [as CaCO3]	DAILY MX	report only	all year
001	Arsenic, total recoverable	DAILY MX	report only	all year
001	Iron, total recoverable	DAILY MX	report only	all year
001	Selenium, total recoverable	DAILY MX	report only	all year
001	Thallium, total recoverable	DAILY MX	report only	all year
001	Beryllium, total recoverable [as Be]	DAILY MX	report only	all year
001	Nickel, total recoverable	DAILY MX	report only	all year
001	Silver total recoverable	DAILY MX	report only	all year
001	Zinc, total recoverable	DAILY MX	<= 131 ug/L	all year
001	Zinc, total recoverable	DAILY MX	report only	all year
001	Zinc, total recoverable	DAILY MX	<= 7.44 g/d	all year
001	Cadmium, total recoverable	DAILY MX	report only	all year
001	Lead, total recoverable	DAILY MX	report only	all year
001	Chromium, total recoverable	DAILY MX	report only	all year
001	Copper, total recoverable	DAILY MX	<= 15 ug/L	all year
001	Copper, total recoverable	DAILY MX	report only	all year
001	Copper, total recoverable	DAILY MX	<= .84 g/d	all year
001	Chromium, hexavalent dissolved [as Cr]	DAILY MX	report only	all year
001	Antimony, total recoverable	DAILY MX	report only	all year
001	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
001	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
001	Chlorine, total residual	DAILY MX	<= 19 ug/L	all year
001	Chlorine, total residual	DAILY MX	report only	all year
001	Chlorine, total residual	DAILY MX	<= 1.1 g/d	all year
001	E. coli, colony forming units [CFU]	MO AVG	<= 126 CFU/100mL	all year
001	E. coli, colony forming units [CFU]	DAILY MX	<= 575 CFU/100mL	all year
001	E. coli, colony forming units [CFU]	DAILY MX	report only	all year
001	Solids, total dissolved	DAILY MX	report only	all year
001	Mercury, total recoverable	DAILY MX	report only	all year
001	BOD, 5-day, percent removal	MO AV MN	>= 85 %	all year
001	Solids, suspended percent removal	MO AV MN	>= 85 %	all year
001	Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubia	MO MED	report only	all year
001	Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas	MO MED	report only	all year
002	Temperature, water deg. centigrade	DAILY MX	report only	all year
002	Oxygen, dissolved [DO]	DAILY MX	report only	all year
002	BOD, 5-day, 20 deg. C	MO AVG	<= 30 mg/L	all year
002	BOD, 5-day, 20 deg. C	WKLY AVG	<= 45 mg/L	all year
002	BOD, 5-day, 20 deg. C	DAILY MX	report only	all year
002	BOD, 5-day, 20 deg. C	MO AVG	<= 1.7 kg/d	all year
002	BOD, 5-day, 20 deg. C	WKLY AVG	<= 2.6 kg/d	all year
002	pH	MINIMUM	>= 6.5 SU	all year
002	pH	MINIMUM	report only	all year
002	pH	MAXIMUM	<= 9 SU	all year
002	pH	MAXIMUM	report only	all year
002	Solids, total suspended	MO AVG	<= 30 mg/L	all year
002	Solids, total suspended	WKLY AVG	<= 45 mg/L	all year
002	Solids, total suspended	DAILY MX	report only	all year
002	Solids, total suspended	MO AVG	<= 1.7 kg/d	all year
002	Solids, total suspended	WKLY AVG	<= 2.6 kg/d	all year
002	Oil & Grease	MO AVG	report only	all year
002	Oil & Grease	DAILY MX	report only	all year
002	Oil & Grease	DAILY MX	report only	all year
002	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
002	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
002	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
002	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
002	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
002	Phosphorus, total [as P]	DAILY MX	report only	all year
002	Cyanide, total [as CN]	DAILY MX	<= 41 ug/L	all year
002	Cyanide, total [as CN]	DAILY MX	report only	all year
002	Cyanide, total [as CN]	DAILY MX	<= 2.3 g/d	all year
002	Hardness, total [as CaCO3]	DAILY MX	report only	all year
002	Hardness, total [as CaCO3]	DAILY MX	report only	all year
002	Arsenic, total recoverable	DAILY MX	report only	all year
002	Iron, total recoverable	DAILY MX	report only	all year
002	Selenium, total recoverable	DAILY MX	report only	all year
002	Thallium, total recoverable	DAILY MX	report only	all year
002	Beryllium, total recoverable [as Be]	DAILY MX	report only	all year
002	Nickel, total recoverable	DAILY MX	report only	all year
002	Silver total recoverable	DAILY MX	report only	all year
002	Zinc, total recoverable	DAILY MX	<= 131 ug/L	all year
002	Zinc, total recoverable	DAILY MX	report only	all year
002	Zinc, total recoverable	DAILY MX	<= 7.44 g/d	all year
002	Cadmium, total recoverable	DAILY MX	report only	all year
002	Lead, total recoverable	DAILY MX	report only	all year
002	Chromium, total recoverable	DAILY MX	report only	all year
002	Copper, total recoverable	DAILY MX	<= 15 ug/L	all year
002	Copper, total recoverable	DAILY MX	report only	all year
002	Copper, total recoverable	DAILY MX	<= .84 g/d	all year
002	Chromium, hexavalent dissolved [as Cr]	DAILY MX	report only	all year
002	Antimony, total recoverable	DAILY MX	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	Chlorine, total residual	DAILY MX	<= 19 ug/L	all year
002	Chlorine, total residual	DAILY MX	report only	all year
002	Chlorine, total residual	DAILY MX	<= 1.1 g/d	all year
002	E. coli, colony forming units [CFU]	MO AVG	<= 126 CFU/100mL	all year
002	E. coli, colony forming units [CFU]	DAILY MX	<= 575 CFU/100mL	all year
002	E. coli, colony forming units [CFU]	DAILY MX	report only	all year
002	Solids, total dissolved	DAILY MX	report only	all year
002	Mercury, total recoverable	DAILY MX	report only	all year
002	BOD, 5-day, percent removal	MO AV MN	>= 85 %	all year
002	Solids, suspended percent removal	MO AV MN	>= 85 %	all year
002	Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubia	MO MED	report only	all year
002	Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas	MO MED	report only	all year
003	Temperature, water deg. centigrade	DAILY MX	report only	all year
003	Oxygen, dissolved [DO]	DAILY MX	report only	all year
003	BOD, 5-day, 20 deg. C	MO AVG	<= 30 mg/L	all year
003	BOD, 5-day, 20 deg. C	WKLY AVG	<= 45 mg/L	all year
003	BOD, 5-day, 20 deg. C	DAILY MX	report only	all year
003	BOD, 5-day, 20 deg. C	MO AVG	<= 1.7 kg/d	all year
003	BOD, 5-day, 20 deg. C	WKLY AVG	<= 2.6 kg/d	all year
003	pH	MINIMUM	>= 6.5 SU	all year
003	pH	MINIMUM	report only	all year
003	pH	MAXIMUM	<= 9 SU	all year
003	pH	MAXIMUM	report only	all year
003	Solids, total suspended	MO AVG	<= 30 mg/L	all year
003	Solids, total suspended	WKLY AVG	<= 45 mg/L	all year
003	Solids, total suspended	DAILY MX	report only	all year
003	Solids, total suspended	MO AVG	<= 1.7 kg/d	all year
003	Solids, total suspended	WKLY AVG	<= 2.6 kg/d	all year
003	Oil & Grease	MO AVG	report only	all year
003	Oil & Grease	DAILY MX	report only	all year
003	Oil & Grease	DAILY MX	report only	all year
003	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
003	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
003	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
003	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
003	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
003	Phosphorus, total [as P]	DAILY MX	report only	all year
003	Cyanide, total [as CN]	DAILY MX	<= 41 ug/L	all year
003	Cyanide, total [as CN]	DAILY MX	report only	all year
003	Cyanide, total [as CN]	DAILY MX	<= 2.3 g/d	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 recoverable	DAILY MX	report only	all year
003	Iron, total recoverable	DAILY MX	report only	all year
003	Selenium, total recoverable	DAILY MX	report only	all year
003	Thallium, total recoverable	DAILY MX	report only	all year
003	Beryllium, total recoverable [as Be]	DAILY MX	report only	all year
003	Nickel, total recoverable	DAILY MX	report only	all year
003	Silver total recoverable	DAILY MX	report only	all year
003	Zinc, total recoverable	DAILY MX	<= 131 ug/L	all year
003	Zinc, total recoverable	DAILY MX	report only	all year
003	Zinc, total recoverable	DAILY MX	<= 7.44 g/d	all year
003	Cadmium, total recoverable	DAILY MX	report only	all year
003	Lead, total recoverable	DAILY MX	report only	all year
003	Chromium, total recoverable	DAILY MX	report only	all year
003	Copper, total recoverable	DAILY MX	<= 15 ug/L	all year
003	Copper, total recoverable	DAILY MX	report only	all year
003	Copper, total recoverable	DAILY MX	<= .84 g/d	all year
003	Chromium, hexavalent dissolved [as Cr]	DAILY MX	report only	all year
003	Antimony, total recoverable	DAILY MX	report only	all year
003	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
003	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
003	Chlorine, total residual	DAILY MX	<= 19 ug/L	all year
003	Chlorine, total residual	DAILY MX	report only	all year
003	Chlorine, total residual	DAILY MX	<= 1.1 g/d	all year
003	E. coli, colony forming units [CFU]	MO AVG	<= 126 CFU/100mL	all year
003	E. coli, colony forming units [CFU]	DAILY MX	<= 575 CFU/100mL	all year
003	E. coli, colony forming units [CFU]	DAILY MX	report only	all year
003	Solids, total dissolved	DAILY MX	report only	all year
003	Mercury, total recoverable	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	Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubia	MO MED	report only	all year
003	Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas	MO MED	report only	all year
INF	BOD, 5-day, 20 deg. C	MO AVG	report only	all year
INF	BOD, 5-day, 20 deg. C	WKLY AVG	report only	all year
INF	Solids, total suspended	MO AVG	report only	all year
INF	Solids, total suspended	WKLY AVG	report only	all year