PITTSFIELD W W T P — NPDES permit MA0101681: limits, due date and EPA's record

NPDES permit MA0101681 · Major POTW · effective, expires 2026-10-31 · EPA's file as of 2026-09-19

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

Last period with anything received: 2026-07-31. Most often over: Aluminum, total recoverable (3), Oxygen, dissolved [DO] (1).

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (97)

Outfall	Parameter	Statistic	Limit	Months
003	Temperature, water deg. centigrade	DAILY MX	report only	Jan, Jul
003	Oxygen, dissolved [DO]	MINIMUM	>= 6 mg/L	Apr, May, Jun, Jul, Aug, Sep, Oct
003	pH	MINIMUM	>= 6.5 SU	all year
003	pH	MAXIMUM	<= 8.3 SU	all year
003	pH	DAILY MX	report only	Jan, Jul
003	Solids, total suspended	MO AVG	<= 20 mg/L	all year
003	Solids, total suspended	WKLY AVG	<= 25 mg/L	all year
003	Solids, total suspended	DAILY MX	report only	all year
003	Solids, total suspended	MO AVG	<= 2840 lb/d	all year
003	Solids, total suspended	WKLY AVG	<= 3550 lb/d	all year
003	Solids, total suspended	MO AVG	report only	all year
003	Nitrogen, total [as N]	MO AVG	report only	all year
003	Nitrogen, total [as N]	DAILY MX	report only	all year
003	Nitrogen, total [as N]	MO AVG	report only	all year
003	Nitrogen, total [as N]	ROLL AVG	<= 709 lb/d	all year
003	Ammonia nitrogen, total, [as N] 30 day	DAILY MX	report only	Jan, Jul
003	Nitrogen, ammonia total [as N]	MO AVG	<= 1 mg/L	Jun, Jul, Aug, Sep
003	Nitrogen, ammonia total [as N]	MO AVG	report only	Jan, Feb, Mar, Oct, Nov, Dec
003	Nitrogen, ammonia total [as N]	WKLY AVG	<= 10 mg/L	Apr
003	Nitrogen, ammonia total [as N]	WKLY AVG	<= 5 mg/L	May
003	Nitrogen, ammonia total [as N]	WKLY AVG	<= 1 mg/L	Jun, Jul, Aug, Sep
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 15 mg/L	Apr
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 8 mg/L	May
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 1.5 mg/L	Jun, Jul, Aug, Sep
003	Nitrogen, ammonia total [as N]	DAILY MX	report only	Jan, Feb, Mar, Oct, Nov, Dec
003	Nitrogen, ammonia total [as N]	DAILY MX	report only	Jan, Jul
003	Nitrogen, ammonia total [as N]	MO AVG	<= 192 lb/d	Apr
003	Nitrogen, ammonia total [as N]	MO AVG	<= 192 lb/d	May
003	Nitrogen, ammonia total [as N]	MO AVG	report only	Jun, Jul, Aug, Sep
003	Nitrogen, ammonia total [as N]	WKLY AVG	report only	Jun, Jul, Aug, Sep
003	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
003	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
003	Nitrite + Nitrate total [as N]	MO AVG	report only	all year
003	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
003	Phosphorus, total [as P]	MO AVG	<= 1 mg/L	Jan, Feb, Mar, Nov, Dec
003	Phosphorus, total [as P]	MO AVG	<= .1 mg/L	Apr, May, Jun, Jul, Aug, Sep, Oct
003	Phosphorus, total [as P]	DAILY MX	report only	Apr, May, Jun, Jul, Aug, Sep, Oct
003	Phosphorus, total [as P]	DAILY MX	report only	Apr, May, Jun, Jul, Aug, Sep, Oct
003	Carbon, tot organic [TOC]	DAILY MX	report only	Jan, Jul
003	Carbon, tot organic [TOC]	DAILY MX	report only	Jan, Jul
003	Carbon, dissolved organic [as C]	DAILY MX	report only	Jan, Jul
003	Hardness, total [as CaCO3]	DAILY MX	report only	Jan, Jul
003	Hardness, total [as CaCO3]	DAILY MX	report only	Jan, Jul
003	Cadmium, total [as Cd]	DAILY MX	report only	Jan, Jul
003	Cadmium, total [as Cd]	DAILY MX	report only	Jan, Jul
003	Copper, total [as Cu]	DAILY MX	report only	Jan, Jul
003	Copper, total [as Cu]	DAILY MX	report only	Jan, Jul
003	Lead, total [as Pb]	DAILY MX	report only	Jan, Jul
003	Lead, total [as Pb]	DAILY MX	report only	Jan, Jul
003	Nickel, total [as Ni]	DAILY MX	report only	Jan, Jul
003	Nickel, total [as Ni]	DAILY MX	report only	Jan, Jul
003	Zinc, total [as Zn]	DAILY MX	report only	Jan, Jul
003	Zinc, total [as Zn]	DAILY MX	report only	Jan, Jul
003	Aluminum, total recoverable	MO AVG	<= 171 ug/L	all year
003	Aluminum, total recoverable	DAILY MX	report only	all year
003	Aluminum, total [as Al]	DAILY MX	report only	Jan, Jul
003	Aluminum, total [as Al]	DAILY MX	report only	Jan, Jul
003	Copper, total recoverable	MO AVG	<= 18 ug/L	all year
003	Copper, total recoverable	DAILY MX	<= 24.9 ug/L	all year
003	Di[2-ethylhexyl] phthalate [DEHP]	DAILY MX	report only	all year
003	Di[2-ethylhexyl] phthalate [DEHP]	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	Flow, in conduit or thru treatment plant	ROLL AVG	<= 17 MGD	all year
003	Chlorine, total residual	MO AVG	<= 21.7 ug/L	Apr, May, Jun, Jul, Aug, Sep, Oct
003	Chlorine, total residual	DAILY MX	<= 37.4 ug/L	Apr, May, Jun, Jul, Aug, Sep, Oct
003	E. coli	MO GEO	<= 126 MPN/100mL	Apr, May, Jun, Jul, Aug, Sep, Oct
003	E. coli	DAILY MX	<= 409 MPN/100mL	Apr, May, Jun, Jul, Aug, Sep, Oct
003	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 10 mg/L	all year
003	BOD, carbonaceous [5 day, 20 C]	WKLY AVG	<= 10 mg/L	all year
003	BOD, carbonaceous [5 day, 20 C]	DAILY MX	report only	all year
003	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 1420 lb/d	all year
003	BOD, carbonaceous [5 day, 20 C]	WKLY AVG	<= 1420 lb/d	all year
003	BOD, carbonaceous [5 day, 20 C]	MO AVG	report only	all year
003	BOD, carb-5 day, 20 deg C, percent removal	MO AV MN	>= 85 %	all year
003	Solids, suspended percent removal	MO AV MN	>= 85 %	all year
003	LC50 Static 48Hr Acute Ceriodaphnia dubia	DAILY MN	>= 100 %	Jan, Jul
003	NOEL Static 7Day Chronic Ceriodaphnia dubia	DAILY MN	>= 50 %	Jan, Jul
003	Noel Statre 7Day Chronic Pimephales	DAILY MN	>= 50 %	Jan, Jul
PFAS	Perfluorooctanoic acid (PFOA)	DAILY MX	report only	all year
PFAS	Perfluorooctanoic acid (PFOA)	DAILY MX	report only	all year
PFAS	Perfluorooctanoic acid (PFOA)	DAILY MX	report only	all year
PFAS	Perfluorooctanesulfonate	DAILY MX	report only	all year
PFAS	Perfluorooctanesulfonate	DAILY MX	report only	all year
PFAS	Perfluoroheptanoic acid (PFHpA)	DAILY MX	report only	all year
PFAS	Perfluoroheptanoic acid (PFHpA)	DAILY MX	report only	all year
PFAS	Perfluoroheptanoic acid (PFHpA)	DAILY MX	report only	all year
PFAS	Perfluorononanoic acid (PFNA)	DAILY MX	report only	all year
PFAS	Perfluorodecanoic acid (PFDA)	DAILY MX	report only	all year
PFAS	Perfluorodecanoic acid (PFDA)	DAILY MX	report only	all year
PFAS	Perfluorodecanoic acid (PFDA)	DAILY MX	report only	all year
PFAS	Perfluorohexanesulfonic acid (PFHxS)	DAILY MX	report only	all year
PFAS	Perfluorohexanesulfonic acid (PFHxS)	DAILY MX	report only	all year
PFAS	Perfluorohexanesulfonic acid (PFHxS)	DAILY MX	report only	all year
PFAS	Perfluorooctanesulfonic acid (PFOS)	DAILY MX	report only	all year
PFAS	Perfluorooctanesulfonic acid (PFOS)	DAILY MX	report only	all year
PFAS	Perfluorooctanesulfonic acid (PFOS)	DAILY MX	report only	all year