TECUMSEH, CITY OF
NPDES ID: OK0020788
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: 8 effluent violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
224% over limit
Discharged 14.6 mg/L against a permitted limit of 4.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
E. coli
11920% over limit
Discharged 48800 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
54% over limit
Discharged 10.51463991 kg/d against a permitted limit of 6.81453994 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
11% over limit
Discharged 5.37 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
E. coli
1% over limit
Discharged 127.65 MPN/100mL against a permitted limit of 126 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Chlorine, total residual
52% over limit
Discharged 0.15 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
98% over limit
Discharged 5.93 mg/L against a permitted limit of 3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Chlorine, total residual
31% over limit
Discharged 0.13 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
20% over limit
Discharged 81.53839931 kg/d against a permitted limit of 68.15447943 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
87% over limit
Discharged 84 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
72% over limit
Discharged 0.17 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Numeric Violation
February 28, 2026
Chlorine, total residual
11% over limit
Discharged 0.11 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Numeric Violation
January 31, 2026
Chlorine, total residual
92% over limit
Discharged 0.19 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Numeric Violation
December 31, 2025
Chlorine, total residual
21% over limit
Discharged 0.12 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Numeric Violation
November 30, 2025
Chlorine, total residual
506% over limit
Discharged 0.6 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
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
E. coli
383% over limit
Discharged 9800 MPN/100mL against a permitted limit of 2030 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Chlorine, total residual
213% over limit
Discharged 0.31 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
144% over limit
Discharged 55 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
143% over limit
Discharged 36.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
pH
0% over limit
Discharged 6.37 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
Solids, total suspended
11% over limit
Discharged 25 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
11% over limit
Discharged 0.11 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Numeric Violation
August 31, 2025
Solids, total suspended
8% over limit
Discharged 24.2 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
E. coli
389% over limit
Discharged 1986 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
658% over limit
Discharged 0.75 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Numeric Violation
May 31, 2025
BOD, carbonaceous [5 day, 20 C]
68% over limit
Discharged 25.2 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Solids, total suspended
153% over limit
Discharged 38 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
344% over limit
Discharged 100 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Solids, total suspended
33% over limit
Discharged 90.47311924 kg/d against a permitted limit of 68.15447943 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
52% over limit
Discharged 0.15 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
162% over limit
Discharged 118 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
79% over limit
Discharged 53.7 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
74% over limit
Discharged 39.2 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
13% over limit
Discharged 17 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
BOD, carbonaceous [5 day, 20 C]
75% over limit
Discharged 39.3 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
18% over limit
Discharged 17.71 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Solids, total suspended
84% over limit
Discharged 125.19503895 kg/d against a permitted limit of 68.15447943 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
140% over limit
Discharged 108 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
40% over limit
Discharged 20.93 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli
19% over limit
Discharged 2420 MPN/100mL against a permitted limit of 2030 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
65% over limit
Discharged 37.1 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
82% over limit
Discharged 54.5 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
41% over limit
Discharged 48.1376196 kg/d against a permitted limit of 34.07723971 kg/d (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Solids, total suspended
85% over limit
Discharged 126.17567894 kg/d against a permitted limit of 68.15447943 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
69% over limit
Discharged 50.7 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli
19% over limit
Discharged 2419 MPN/100mL against a permitted limit of 2030 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
107% over limit
Discharged 93.3 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
September 30, 2024
BOD, carbonaceous [5 day, 20 C]
130% over limit
Discharged 23.03 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
907% over limit
Discharged 30.2 mg/L against a permitted limit of 3 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
192% over limit
Discharged 43.8 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
570% over limit
Discharged 13.39 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
35% over limit
Discharged 20.27 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
92% over limit
Discharged 8.73495993 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
32% over limit
Discharged 4.07 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
72% over limit
Discharged 38.7 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
E. coli
496% over limit
Discharged 2419 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
E. coli
496% over limit
Discharged 2420 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
672% over limit
Discharged 15.43 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
11% over limit
Discharged 25 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
670% over limit
Discharged 23.1 mg/L against a permitted limit of 3 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
30% over limit
Discharged 19.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
26% over limit
Discharged 4.46 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
199% over limit
Discharged 13.57913989 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
E. coli
496% over limit
Discharged 2419 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)