WRENTHAM DEVELOPMENTAL CENTER
NPDES ID: MAG580008
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: 6 effluent violations.
Violations
May 31, 2026
Phosphorus, total [as P]
540% over limit
Discharged 0.64 mg/L against a permitted limit of 0.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
86% over limit
Discharged 13 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Copper, total [as Cu]
224% over limit
Discharged 0.022 mg/L against a permitted limit of 0.0068 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
7% over limit
Discharged 0.095 mg/L against a permitted limit of 0.089 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
28% over limit
Discharged 0.11100001 mg/L against a permitted limit of 0.087 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
230% over limit
Discharged 0.033 mg/L against a permitted limit of 0.01 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
NOEL Static 7Day Chronic Ceriodaphnia dubia
50% over limit
Discharged 50 % against a permitted limit of 100 % (MO AV MN)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
486% over limit
Discharged 41 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
136% over limit
Discharged 11.8 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
19% over limit
Discharged 14.57339988 kg/d against a permitted limit of 12.2579999 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
100% over limit
Discharged 14 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
NOEL Static 7Day Chronic Ceriodaphnia dubia
88% over limit
Discharged 12.5 % against a permitted limit of 100 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, total suspended
76% over limit
Discharged 8.8 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
120% over limit
Discharged 0.022 mg/L against a permitted limit of 0.01 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
286% over limit
Discharged 27 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
106% over limit
Discharged 0.014 mg/L against a permitted limit of 0.0068 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, total suspended
114% over limit
Discharged 15 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
86% over limit
Discharged 9.3 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Solids, total suspended
71% over limit
Discharged 12 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
NOEL Static 7Day Chronic Ceriodaphnia dubia
50% over limit
Discharged 50 % against a permitted limit of 100 % (MO AV MN)
DMR, Limited - Numeric Violation
Noel Statre 7Day Chronic Pimephales
50% over limit
Discharged 50 % against a permitted limit of 100 % (MO AV MN)
DMR, Limited - Numeric Violation
April 30, 2025
BOD, 5-day, 20 deg. C
29% over limit
Discharged 9 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Solids, total suspended
129% over limit
Discharged 16 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Solids, total suspended
30% over limit
Discharged 6.5 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
129% over limit
Discharged 16 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Perfluorohexanesulfonic acid (PFHxS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorohexanesulfonic acid (PFHxS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanesulfonic acid (PFOS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluoroheptanoic acid (PFHpA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanesulfonic acid (PFOS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorodecanoic acid (PFDA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluoroheptanoic acid (PFHpA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorononanoic acid (PFNA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorodecanoic acid (PFDA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorohexanesulfonic acid (PFHxS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorononanoic acid (PFNA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanesulfonic acid (PFOS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorodecanoic acid (PFDA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluoroheptanoic acid (PFHpA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorononanoic acid (PFNA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
November 30, 2024
Solids, total suspended
343% over limit
Discharged 31 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
86% over limit
Discharged 9.3 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
BOD, 5-day, 20 deg. C
43% over limit
Discharged 10 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
18% over limit
Discharged 0.008 mg/L against a permitted limit of 0.0068 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
25% over limit
Discharged 6.25 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
10% over limit
Discharged 0.011 mg/L against a permitted limit of 0.01 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
190% over limit
Discharged 0.29 mg/L against a permitted limit of 0.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
95% over limit
Discharged 0.17000001 mg/L against a permitted limit of 0.087 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
BOD, 5-day, 20 deg. C
14% over limit
Discharged 8 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
30% over limit
Discharged 6.5 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
100% over limit
Discharged 0.2 mg/L against a permitted limit of 0.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
BOD, 5-day, 20 deg. C
45% over limit
Discharged 7.25 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
29% over limit
Discharged 9 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)