HAROLD E WILLIS W T P
NPDES ID: MAG640019
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: 17 effluent violations.
Violations
May 31, 2026
Aluminum, total [as Al]
75% over limit
Discharged 1.71300008 mg/L against a permitted limit of 0.97800005 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
616% over limit
Discharged 214.8 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
126% over limit
Discharged 0.86000004 mg/L against a permitted limit of 0.38000002 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
50% over limit
Discharged 0.03 mg/L against a permitted limit of 0.02 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
250% over limit
Discharged 0.07 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
1012% over limit
Discharged 556 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Chlorine, total residual
350% over limit
Discharged 0.09 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
97% over limit
Discharged 59.14 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
50% over limit
Discharged 0.03 mg/L against a permitted limit of 0.02 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
3% over limit
Discharged 1.00900005 mg/L against a permitted limit of 0.97800005 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
78% over limit
Discharged 89 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
4% over limit
Discharged 0.39700002 mg/L against a permitted limit of 0.38000002 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
192% over limit
Discharged 146 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
5% over limit
Discharged 0.39900002 mg/L against a permitted limit of 0.38000002 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
59% over limit
Discharged 47.8 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Fluorine, adsorbable organic
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
September 30, 2025
Chlorine, total residual
50% over limit
Discharged 0.03 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
Aluminum, total [as Al]
23% over limit
Discharged 1.20600006 mg/L against a permitted limit of 0.97800005 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
114% over limit
Discharged 107 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Solids, total suspended
48% over limit
Discharged 74 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Fluorine, adsorbable organic
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
78% over limit
Discharged 89 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
158% over limit
Discharged 77.5 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Aluminum, total [as Al]
25% over limit
Discharged 1.22000006 mg/L against a permitted limit of 0.97800005 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
15% over limit
Discharged 0.43600002 mg/L against a permitted limit of 0.38000002 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
12% over limit
Discharged 33.5 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Solids, total suspended
3% over limit
Discharged 30.93 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
44% over limit
Discharged 72 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
25% over limit
Discharged 0.47400002 mg/L against a permitted limit of 0.38000002 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Solids, total suspended
44% over limit
Discharged 72 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
40% over limit
Discharged 41.91 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Solids, total suspended
66% over limit
Discharged 49.9 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
142% over limit
Discharged 121 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total suspended
87% over limit
Discharged 56 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
104% over limit
Discharged 102 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Solids, total suspended
7% over limit
Discharged 32 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.7 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
Solids, total suspended
116% over limit
Discharged 108 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)