City of Saginaw — NPDES permit MI0025577: limits, due date and EPA's record

NPDES permit MI0025577 · Major POTW · effective, expires 2029-10-01 · EPA's file as of 2026-09-19

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

Reporting

Reports are due about 21 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (194)

Outfall	Parameter	Statistic	Limit	Months
001	Oxygen, dissolved [DO]	DAILY MN	>= 3 mg/L	all year
001	pH	DAILY MN	>= 6.5 SU	all year
001	pH	DAILY MX	<= 9 SU	all year
001	Solids, total suspended	MO AVG	<= 30 mg/L	all year
001	Solids, total suspended	7 DA AVG	<= 45 mg/L	all year
001	Solids, total suspended	MO AVG	<= 8000 lb/d	all year
001	Solids, total suspended	7 DA AVG	<= 12000 lb/d	all year
001	Nitrogen, ammonia total [as N]	MO AVG	<= 22 mg/L	Oct, Nov
001	Nitrogen, ammonia total [as N]	DAILY MX	report only	Oct, Nov
001	Nitrogen, ammonia total [as N]	MO AVG	<= 5900 lb/d	Oct, Nov
001	Nitrogen, ammonia total [as N]	DAILY MX	report only	Oct, Nov
001	Phosphorus, total [as P]	MO AVG	<= .7 mg/L	Jan, Feb, Mar, Oct, Nov, Dec
001	Phosphorus, total [as P]	MO AVG	report only	Apr, May, Jun, Jul, Aug, Sep
001	Phosphorus, total [as P]	DAILY MX	report only	Jan, Feb, Mar, Oct, Nov, Dec
001	Phosphorus, total [as P]	DAILY MX	report only	Apr, May, Jun, Jul, Aug, Sep
001	Phosphorus, total [as P]	MO AVG	<= 190 lb/d	Jan, Feb, Mar, Oct, Nov, Dec
001	Phosphorus, total [as P]	MO AVG	report only	Apr, May, Jun, Jul, Aug, Sep
001	Phosphorus, total [as P]	DAILY MX	report only	Jan, Feb, Mar, Oct, Nov, Dec
001	Phosphorus, total [as P]	DAILY MX	report only	Apr, May, Jun, Jul, Aug, Sep
001	Phosphorus, total [as P]	6D	<= .6 mg/L	Apr, May, Jun, Jul, Aug, Sep
001	Phosphorus, total [as P]	6D	<= 160 lb/d	Apr, May, Jun, Jul, Aug, Sep
001	Chloride [as Cl]	DAILY MX	report only	all year
001	Sulfate, total [as SO4]	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	<= 38 ug/L	all year
001	Perfluorooctanesulfonate	DAILY MX	report only	all year
001	Mercury, total [as Hg]	MO AVG	report only	all year
001	Mercury, total [as Hg]	DAILY MX	report only	all year
001	Mercury, total [as Hg]	MO AVG	report only	all year
001	Mercury, total [as Hg]	DAILY MX	report only	all year
001	Mercury, total [as Hg]	1D	<= 3 ng/L	all year
001	Mercury, total [as Hg]	1D	<= .0008 lb/d	all year
001	Coliform, fecal general	MO GEOMN	<= 200 #/100mL	all year
001	Coliform, fecal general	7 DA GEO	<= 400 #/100mL	all year
001	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 17 mg/L	Jun, Jul, Aug, Sep
001	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 25 mg/L	Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 25 mg/L	Jun, Jul, Aug, Sep
001	BOD, carbonaceous [5 day, 20 C]	7 DA AVG	<= 40 mg/L	Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 4500 lb/d	Jun, Jul, Aug, Sep
001	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 6700 lb/d	Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001	BOD, carbonaceous [5 day, 20 C]	7 DA AVG	<= 6700 lb/d	Jun, Jul, Aug, Sep
001	BOD, carbonaceous [5 day, 20 C]	7 DA AVG	<= 11000 lb/d	Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001	BOD, carb-5 day, 20 deg C, percent removal	MINIMUM	>= 75 %	Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001	BOD, carb-5 day, 20 deg C, percent removal	DAILY MN	report only	Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001	Solids, suspended percent removal	MINIMUM	>= 80 %	all year
001	Solids, suspended percent removal	DAILY MN	report only	all year
R03	Oxygen, dissolved [DO]	DAILY MN	report only	all year
R03	pH	DAILY MN	report only	all year
R03	pH	MAXIMUM	report only	all year
R03	Solids, total suspended	MAXIMUM	report only	all year
R03	Nitrogen, ammonia total [as N]	MAXIMUM	report only	all year
R03	Phosphorus, total [as P]	MAXIMUM	report only	all year
R03	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R03	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R03	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R03	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R03	Chlorine, total residual	AH	report only	all year
R03	Chlorine, total residual	MAXIMUM	report only	all year
R03	Coliform, fecal general	MAXIMUM	<= 1000 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec
R03	Coliform, fecal general	MAXIMUM	<= 400 #/100mL	May, Jun, Jul, Aug, Sep, Oct
R03	BOD, carbonaceous [5 day, 20 C]	MAXIMUM	report only	all year
R04	Oxygen, dissolved [DO]	DAILY MN	report only	all year
R04	pH	DAILY MN	report only	all year
R04	pH	MAXIMUM	report only	all year
R04	Solids, total suspended	MAXIMUM	report only	all year
R04	Nitrogen, ammonia total [as N]	MAXIMUM	report only	all year
R04	Phosphorus, total [as P]	MAXIMUM	report only	all year
R04	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R04	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R04	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R04	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R04	Chlorine, total residual	AH	report only	all year
R04	Chlorine, total residual	MAXIMUM	report only	all year
R04	Coliform, fecal general	MAXIMUM	<= 1000 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec
R04	Coliform, fecal general	MAXIMUM	<= 400 #/100mL	May, Jun, Jul, Aug, Sep, Oct
R04	BOD, carbonaceous [5 day, 20 C]	MAXIMUM	report only	all year
R05	Oxygen, dissolved [DO]	DAILY MN	report only	all year
R05	pH	DAILY MN	report only	all year
R05	pH	MAXIMUM	report only	all year
R05	Solids, total suspended	MAXIMUM	report only	all year
R05	Nitrogen, ammonia total [as N]	MAXIMUM	report only	all year
R05	Phosphorus, total [as P]	MAXIMUM	report only	all year
R05	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R05	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R05	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R05	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R05	Chlorine, total residual	AH	report only	all year
R05	Chlorine, total residual	MAXIMUM	report only	all year
R05	Coliform, fecal general	MAXIMUM	<= 400 #/100mL	May, Jun, Jul, Aug, Sep, Oct
R05	Coliform, fecal general	MAXIMUM	<= 1000 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec
R05	BOD, carbonaceous [5 day, 20 C]	MAXIMUM	report only	all year
R06	Oxygen, dissolved [DO]	DAILY MN	report only	all year
R06	pH	DAILY MN	report only	all year
R06	pH	MAXIMUM	report only	all year
R06	Solids, total suspended	MAXIMUM	report only	all year
R06	Nitrogen, ammonia total [as N]	MAXIMUM	report only	all year
R06	Phosphorus, total [as P]	MAXIMUM	report only	all year
R06	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R06	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R06	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R06	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R06	Chlorine, total residual	AH	report only	all year
R06	Chlorine, total residual	MAXIMUM	report only	all year
R06	Coliform, fecal general	MAXIMUM	<= 1000 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec
R06	Coliform, fecal general	MAXIMUM	<= 400 #/100mL	May, Jun, Jul, Aug, Sep, Oct
R06	BOD, carbonaceous [5 day, 20 C]	MAXIMUM	report only	all year
R07	Oxygen, dissolved [DO]	DAILY MN	report only	all year
R07	pH	DAILY MN	report only	all year
R07	pH	MAXIMUM	report only	all year
R07	Solids, total suspended	MAXIMUM	report only	all year
R07	Nitrogen, ammonia total [as N]	MAXIMUM	report only	all year
R07	Phosphorus, total [as P]	MAXIMUM	report only	all year
R07	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R07	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R07	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R07	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R07	Chlorine, total residual	AH	report only	all year
R07	Chlorine, total residual	MAXIMUM	report only	all year
R07	Coliform, fecal general	MAXIMUM	<= 400 #/100mL	May, Jun, Jul, Aug, Sep, Oct
R07	Coliform, fecal general	MAXIMUM	<= 1000 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec
R07	BOD, carbonaceous [5 day, 20 C]	MAXIMUM	report only	all year
R11	Oxygen, dissolved [DO]	DAILY MN	report only	all year
R11	pH	DAILY MN	report only	all year
R11	pH	MAXIMUM	report only	all year
R11	Solids, total suspended	MAXIMUM	report only	all year
R11	Nitrogen, ammonia total [as N]	MAXIMUM	report only	all year
R11	Phosphorus, total [as P]	MAXIMUM	report only	all year
R11	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R11	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R11	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R11	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R11	Chlorine, total residual	AH	report only	all year
R11	Chlorine, total residual	MAXIMUM	report only	all year
R11	Coliform, fecal general	MAXIMUM	<= 400 #/100mL	May, Jun, Jul, Aug, Sep, Oct
R11	Coliform, fecal general	MAXIMUM	<= 1000 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec
R11	BOD, carbonaceous [5 day, 20 C]	MAXIMUM	report only	all year
R37	Oxygen, dissolved [DO]	DAILY MN	report only	all year
R37	pH	DAILY MN	report only	all year
R37	pH	MAXIMUM	report only	all year
R37	Solids, total suspended	MAXIMUM	report only	all year
R37	Nitrogen, ammonia total [as N]	MAXIMUM	report only	all year
R37	Phosphorus, total [as P]	MAXIMUM	report only	all year
R37	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R37	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R37	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
R37	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
R37	Chlorine, total residual	AH	report only	all year
R37	Chlorine, total residual	MAXIMUM	report only	all year
R37	Coliform, fecal general	MAXIMUM	<= 400 #/100mL	May, Jun, Jul, Aug, Sep, Oct
R37	Coliform, fecal general	MAXIMUM	<= 1000 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec
R37	BOD, carbonaceous [5 day, 20 C]	MAXIMUM	report only	all year
SLD	Solids, total	MO MIN	report only	all year
SLD	Solids, total	MO AVG	report only	all year
SLD	Solids, total	MO MAX	report only	all year
SLD	Arsenic, dry weight	MO MIN	report only	all year
SLD	Arsenic, dry weight	MO AVG	report only	all year
SLD	Arsenic, dry weight	MO MAX	<= 75 mg/kg	all year
SLD	Selenium, dry weight	MO MIN	report only	all year
SLD	Selenium, dry weight	MO AVG	report only	all year
SLD	Selenium, dry weight	MO MAX	<= 100 mg/kg	all year
SLD	Copper, dry weight	MO MIN	report only	all year
SLD	Copper, dry weight	MO AVG	report only	all year
SLD	Copper, dry weight	MO MAX	<= 4300 mg/kg	all year
SLD	Cadmium, dry weight	MO MIN	report only	all year
SLD	Cadmium, dry weight	MO AVG	report only	all year
SLD	Cadmium, dry weight	MO MAX	<= 85 mg/kg	all year
SLD	Nitrogen, total Kjeldahl	MO MIN	report only	all year
SLD	Nitrogen, total Kjeldahl	MO AVG	report only	all year
SLD	Nitrogen, total Kjeldahl	MO MAX	report only	all year
SLD	Molybdenum, sludge, total, dry weight [as Mo]	MO MIN	report only	all year
SLD	Molybdenum, sludge, total, dry weight [as Mo]	MO AVG	report only	all year
SLD	Molybdenum, sludge, total, dry weight [as Mo]	MO MAX	<= 75 mg/kg	all year
SLD	Zinc, sludge, total, dry weight [as Zn]	MO MIN	report only	all year
SLD	Zinc, sludge, total, dry weight [as Zn]	MO AVG	report only	all year
SLD	Zinc, sludge, total, dry weight [as Zn]	MO MAX	<= 7500 mg/kg	all year
SLD	Lead, sludge, total, dry weight [as Pb]	MO MIN	report only	all year
SLD	Lead, sludge, total, dry weight [as Pb]	MO AVG	report only	all year
SLD	Lead, sludge, total, dry weight [as Pb]	MO MAX	<= 840 mg/kg	all year
SLD	Nickel, sludge, total, dry weight [as Ni]	MO MIN	report only	all year
SLD	Nickel, sludge, total, dry weight [as Ni]	MO AVG	report only	all year
SLD	Nickel, sludge, total, dry weight [as Ni]	MO MAX	<= 420 mg/kg	all year
SLD	Nitrogen, sludge, total, dry weight [as N]	MO MIN	report only	all year
SLD	Nitrogen, sludge, total, dry weight [as N]	MO AVG	report only	all year
SLD	Nitrogen, sludge, total, dry weight [as N]	MO MAX	report only	all year
SLD	Mercury, sludge, total, dry weight [as Hg]	MO MIN	report only	all year
SLD	Mercury, sludge, total, dry weight [as Hg]	MO AVG	report only	all year
SLD	Mercury, sludge, total, dry weight [as Hg]	MO MAX	<= 57 mg/kg	all year
SLD	Potassium, sludge, total, dry weight [as K]	MO MIN	report only	all year
SLD	Potassium, sludge, total, dry weight [as K]	MO AVG	report only	all year
SLD	Potassium, sludge, total, dry weight [as K]	MO MAX	report only	all year
SLD	Phosphorus, sludge, total, dry weight [as P]	MO MIN	report only	all year
SLD	Phosphorus, sludge, total, dry weight [as P]	MO AVG	report only	all year
SLD	Phosphorus, sludge, total, dry weight [as P]	MO MAX	report only	all year