GREENFIELD W P C P
NPDES ID: MAG590014
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
This quarter: 3 effluent violations.
Violations
May 31, 2026
Nitrogen, total [as N]
21% over limit
Discharged 155.69475869 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, total [as N]
27% over limit
Discharged 163.32649863 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
1% over limit
Discharged 0.84 mg/L against a permitted limit of 0.83 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, suspended percent removal
5% over limit
Discharged 84.3 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
14% over limit
Discharged 146.55119877 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, total [as N]
23% over limit
Discharged 158.55041867 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, total [as N]
26% over limit
Discharged 161.61037864 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, total [as N]
32% over limit
Discharged 169.56445858 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, total [as N]
36% over limit
Discharged 174.43587853 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, total [as N]
40% over limit
Discharged 180.05185849 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, total [as N]
42% over limit
Discharged 182.29915847 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
16% over limit
Discharged 4.3 mg/L against a permitted limit of 3.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Phosphorus, total [as P]
2% over limit
Discharged 3.765 mg/L against a permitted limit of 3.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
33% over limit
Discharged 170.55871857 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, total [as N]
24% over limit
Discharged 158.96355866 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 6.4 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
June 30, 2025
BOD, 5-day, percent removal
18% over limit
Discharged 82.3 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
45% over limit
Discharged 186.22171844 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 6.4 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
1% over limit
Discharged 84.9 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
May 31, 2025
BOD, 5-day, 20 deg. C
9% over limit
Discharged 396.34199667 kg/d against a permitted limit of 363.65399694 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
76% over limit
Discharged 641.04799461 kg/d against a permitted limit of 363.65399694 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
231% over limit
Discharged 1804.19598484 kg/d against a permitted limit of 545.25399542 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
23% over limit
Discharged 81.5 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
84% over limit
Discharged 1004.70199156 kg/d against a permitted limit of 545.25399542 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
88% over limit
Discharged 71.8 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
45% over limit
Discharged 185.74047844 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, total [as N]
40% over limit
Discharged 179.64325849 kg/d against a permitted limit of 128.48199892 kg/d (ROLL AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Perfluorodecanesulfonic acid (PFDS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorododecanoic acid (PFDoA)
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
3-Perfluoropropyl propanoic acid (3:3 FTCA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Hexafluoropropylene oxide dimer acid (HFPO-DA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluoropentanoic acid (PFPeA)
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
Perfluorohexanoic acid (PFHxA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorobutanesulfonic acid (PFBS)
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
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorododecanesulfonic acid (PFDoS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
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
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
1% over limit
Discharged 3.42 MGD against a permitted limit of 3.4 MGD (ROLL AVG)
DMR, Limited - Numeric Violation
Perfluoroundecanoic acid (PFUnA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorotetradecanoic acid (PFTeDA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorotridecanoic acid (PFTrDA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
N-methyl perfluorooctanesulfonamide (NMeFOSA)
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
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
3-Perfluoroheptyl propanoic acid (7:3 FTCA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorononanesulfonic acid (PFNS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorobutanoic acid (PFBA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanesulfonamide (PFOSA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluoro-3-methoxypropanoic acid (PFMPA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluoropentanesulfonic acid (PFPeS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)
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
Perfluoroheptanesulfonic acid (PFHpS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
N-ethyl perfluorooctanesulfonamide (NEtFOSA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluoro-4-methoxybutanoic acid (PFMBA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
August 31, 2024
BOD, 5-day, percent removal
41% over limit
Discharged 78.9 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
5% over limit
Discharged 3.56 MGD against a permitted limit of 3.4 MGD (ROLL AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
3% over limit
Discharged 84.6 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
July 31, 2024
Flow, in conduit or thru treatment plant
4% over limit
Discharged 3.55 MGD against a permitted limit of 3.4 MGD (ROLL AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)