PITTSFIELD W W T P
NPDES ID: MA0101681
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 3 effluent violations.
Violations
June 30, 2026
Aluminum, total recoverable
109% over limit
Discharged 0.35700002 mg/L against a permitted limit of 0.17100001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Aluminum, total recoverable
222% over limit
Discharged 0.55000003 mg/L against a permitted limit of 0.17100001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
43% over limit
Discharged 3.4 mg/L against a permitted limit of 6 mg/L (MINIMUM)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, suspended percent removal
0% over limit
Discharged 98 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 4.8 mg/L against a permitted limit of 25 mg/L (WKLY AVG)
DMR, Limited - Overdue
LC50 Static 48Hr Acute Ceriodaphnia dubia
0% over limit
Discharged 100 % against a permitted limit of 100 % (DAILY MN)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 195.67399836 kg/d against a permitted limit of 644.67999458 kg/d (WKLY AVG)
DMR, Limited - Overdue
Cadmium, total [as Cd]
0% over limit
Discharged 0.002 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 9.9 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.28 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 1 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 2.01 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 9.4 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Carbon, tot organic [TOC]
0% over limit
Discharged 4.51 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0.005 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Aluminum, total recoverable
0% over limit
Discharged 0.076 mg/L against a permitted limit of 0.17100001 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 4.9 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 87 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 191.13399839 kg/d against a permitted limit of 1611.69998646 kg/d (WKLY AVG)
DMR, Limited - Overdue
NOEL Static 7Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 100 % against a permitted limit of 50 % (DAILY MN)
DMR, Limited - Overdue
Aluminum, total [as Al]
0% over limit
Discharged 0.0981 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 7.6 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Cadmium, total [as Cd]
0% over limit
Discharged 0.002 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Aluminum, total recoverable
0% over limit
Discharged 0.076 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 9.7 MGD against a permitted limit of 17 MGD (ROLL AVG)
DMR, Limited - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 283.74999762 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Carbon, tot organic [TOC]
0% over limit
Discharged 2.31 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 2.5 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Overdue
Nickel, total [as Ni]
0% over limit
Discharged 0.0277 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Lead, total [as Pb]
0% over limit
Discharged 0.001 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 7.6 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Overdue
Hardness, total [as CaCO3]
0% over limit
Discharged 158 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0.001 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total recoverable
0% over limit
Discharged 0.0028 mg/L against a permitted limit of 0.0249 mg/L (DAILY MX)
DMR, Limited - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 7.8 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 11.1 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0.00318 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 6.3 SU against a permitted limit of 0 SU (DAILY MX)
DMR, Monitor Only - Overdue
Hardness, total [as CaCO3]
0% over limit
Discharged 106 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 92.61599922 kg/d against a permitted limit of 644.67999458 kg/d (MO AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.1 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 6.2 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 3.3 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, carb-5 day, 20 deg C, percent removal
0% over limit
Discharged 97.1 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0.00984 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 6.8 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Lead, total [as Pb]
0% over limit
Discharged 0.00198 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 140.28599882 kg/d against a permitted limit of 321.8859973 kg/d (ROLL AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.151 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Temperature, water deg. centigrade
0% over limit
Discharged -1.11 deg C against a permitted limit of 0 deg C (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 120.76399899 kg/d against a permitted limit of 1289.35998917 kg/d (MO AVG)
DMR, Limited - Overdue
Nickel, total [as Ni]
0% over limit
Discharged 0.005 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 1.6 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 166 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Ammonia nitrogen, total, [as N] 30 day
0% over limit
Discharged 0.119 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Aluminum, total [as Al]
0% over limit
Discharged 0.05 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total recoverable
0% over limit
Discharged 0.0028 mg/L against a permitted limit of 0.018 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 9.6 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.286 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Overdue
Carbon, dissolved organic [as C]
0% over limit
Discharged 2.22 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Di[2-ethylhexyl] phthalate [DEHP]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
September 30, 2025
Aluminum, total recoverable
191% over limit
Discharged 0.49700002 mg/L against a permitted limit of 0.17100001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Aluminum, total recoverable
43% over limit
Discharged 0.24400001 mg/L against a permitted limit of 0.17100001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
LC50 Static 48Hr Acute Ceriodaphnia dubia
56% over limit
Discharged 43.6 % against a permitted limit of 100 % (DAILY MN)
DMR, Limited - Numeric Violation
April 30, 2025
Phosphorus, total [as P]
26% over limit
Discharged 0.126 mg/L against a permitted limit of 0.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
9% over limit
Discharged 0.18600001 mg/L against a permitted limit of 0.17100001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, total [as N]
2% over limit
Discharged 329.14999723 kg/d against a permitted limit of 321.8859973 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, total [as N]
3% over limit
Discharged 330.51199722 kg/d against a permitted limit of 321.8859973 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrogen, total [as N]
6% over limit
Discharged 340.95399714 kg/d against a permitted limit of 321.8859973 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
51% over limit
Discharged 0.25800001 mg/L against a permitted limit of 0.17100001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, total [as N]
8% over limit
Discharged 348.21799707 kg/d against a permitted limit of 321.8859973 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Aluminum, total recoverable
47% over limit
Discharged 0.25100001 mg/L against a permitted limit of 0.17100001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
11% over limit
Discharged 356.843997 kg/d against a permitted limit of 321.8859973 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Aluminum, total recoverable
18% over limit
Discharged 0.20100001 mg/L against a permitted limit of 0.17100001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Nitrogen, total [as N]
12% over limit
Discharged 360.92999697 kg/d against a permitted limit of 321.8859973 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
28% over limit
Discharged 0.21900001 mg/L against a permitted limit of 0.17100001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli
174% over limit
Discharged 1119.9 MPN/100mL against a permitted limit of 409 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (4 hours ago)