CENTER CREEK 201 WWTP
NPDES ID: MO0040185
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: 4 effluent violations, 35 reporting violations.
Violations
May 31, 2026
Zinc, total recoverable
2% over limit
Discharged 0.0935 mg/L against a permitted limit of 0.092 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
95% over limit
Discharged 4.3 mg/L against a permitted limit of 2.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Zinc, total recoverable
122% over limit
Discharged 0.20400001 mg/L against a permitted limit of 0.092 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total recoverable
155% over limit
Discharged 0.47900002 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
pH
0% over limit
Discharged 7.5 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Solids, suspended percent removal
0% over limit
Discharged 98.7 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.1 mg/L against a permitted limit of 3.1 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 13 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 13 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 0.1 mg/L against a permitted limit of 12.1 mg/L (DAILY MX)
DMR, Limited - Overdue
Zinc, total recoverable
56% over limit
Discharged 0.29300001 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Overdue
Zinc, total recoverable
56% over limit
Discharged 0.29300001 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
0% over limit
Discharged 2.5 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Hardness, total [as CaCO3]
0% over limit
Discharged 146 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 13.5 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 7.1 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 0.5 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 24.4 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 7 mg/L against a permitted limit of 30 mg/L (WKLY AVG)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 2.5 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Zinc, total recoverable
109% over limit
Discharged 0.19200001 mg/L against a permitted limit of 0.092 mg/L (MO AVG)
DMR, Limited - Overdue
Zinc, total recoverable
109% over limit
Discharged 0.19200001 mg/L against a permitted limit of 0.092 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 24.4 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 195 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 2.80021786 MGD against a permitted limit of 0 MGD (MO TOTAL)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 4.6 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 6.65 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Hardness, total [as CaCO3]
0% over limit
Discharged 146 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 13.5 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 14 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 0.5 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
BOD, 5-day, percent removal
0% over limit
Discharged 97.4 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 2 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 1 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 4.6 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 14 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 149 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 2.746 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 5 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 3 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 1 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
February 28, 2026
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
BOD, 5-day, 20 deg. C
0% over limit
Discharged 5 mg/L against a permitted limit of 30 mg/L (WKLY AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 5 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Overdue
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 30.6 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 4.4 mg/L against a permitted limit of 0 mg/L (MO AVG)
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 (DAILY MX)
DMR, Monitor Only - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 14.6 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 16.1 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 2 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 0.5 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 5.472 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.12900001 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 193 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, percent removal
0% over limit
Discharged 98 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.3 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 2.8 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Hardness, total [as CaCO3]
0% over limit
Discharged 200 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 14.6 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 16.2 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, suspended percent removal
0% over limit
Discharged 98.9 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 250 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.083 mg/L against a permitted limit of 0.092 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 0.5 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 0.3 mg/L against a permitted limit of 2.7 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 16.1 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 30.6 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 0.8 mg/L against a permitted limit of 10.1 mg/L (MO MAX)
DMR, Limited - Overdue
Hardness, total [as CaCO3]
0% over limit
Discharged 200 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 4.4 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 2.8 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 7.1 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 3.27927478 MGD against a permitted limit of 0 MGD (MO TOTAL)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 3.216 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 16.2 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
December 31, 2025
Zinc, total recoverable
23% over limit
Discharged 0.11300001 mg/L against a permitted limit of 0.092 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
86% over limit
Discharged 18.8 mg/L against a permitted limit of 10.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
284% over limit
Discharged 2420 MPN/100mL against a permitted limit of 630 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
400% over limit
Discharged 6.5 mg/L against a permitted limit of 1.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
206% over limit
Discharged 37 mg/L against a permitted limit of 12.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
284% over limit
Discharged 2420 MPN/100mL against a permitted limit of 630 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1107% over limit
Discharged 18.1 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
E. coli
284% over limit
Discharged 2420 MPN/100mL against a permitted limit of 630 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Zinc, total recoverable
159% over limit
Discharged 0.48800002 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
270% over limit
Discharged 0.34000002 mg/L against a permitted limit of 0.092 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
109% over limit
Discharged 4.6 mg/L against a permitted limit of 2.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
7% over limit
Discharged 12.9 mg/L against a permitted limit of 12.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
284% over limit
Discharged 2420 MPN/100mL against a permitted limit of 630 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
E. coli
1237% over limit
Discharged 1684 MPN/100mL against a permitted limit of 126 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
April 30, 2025
Zinc, total recoverable
15844% over limit
Discharged 544.34599543 kg/d against a permitted limit of 3.41407997 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
1112% over limit
Discharged 1.19900006 mg/L against a permitted limit of 0.0989 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli
869% over limit
Discharged 1.22100006 MPN/100mL against a permitted limit of 0.12600001 MPN/100mL (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total recoverable
537% over limit
Discharged 1.19900006 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
210% over limit
Discharged 1.95180009 MPN/100mL against a permitted limit of 0.63000003 MPN/100mL (WKLY AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Zinc, total recoverable
72% over limit
Discharged 0.32300002 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
227% over limit
Discharged 0.32300002 mg/L against a permitted limit of 0.0989 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Zinc, total recoverable
307% over limit
Discharged 0.40300002 mg/L against a permitted limit of 0.0989 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total recoverable
7% over limit
Discharged 3.66377997 kg/d against a permitted limit of 3.41407997 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
114% over limit
Discharged 0.40300002 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Zinc, total recoverable
142% over limit
Discharged 0.45500002 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
13% over limit
Discharged 3.85445997 kg/d against a permitted limit of 3.41407997 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
360% over limit
Discharged 0.45500002 mg/L against a permitted limit of 0.0989 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Zinc, total recoverable
3% over limit
Discharged 0.19300001 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
95% over limit
Discharged 0.19300001 mg/L against a permitted limit of 0.0989 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Zinc, total recoverable
63% over limit
Discharged 0.30600001 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
2% over limit
Discharged 3.48671997 kg/d against a permitted limit of 3.41407997 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
209% over limit
Discharged 0.30600001 mg/L against a permitted limit of 0.0989 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Zinc, total recoverable
287% over limit
Discharged 0.38300002 mg/L against a permitted limit of 0.0989 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total recoverable
104% over limit
Discharged 0.38300002 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
284% over limit
Discharged 2.42000011 MPN/100mL against a permitted limit of 0.63000003 MPN/100mL (WKLY AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Zinc, total recoverable
27% over limit
Discharged 0.23900001 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
142% over limit
Discharged 0.23900001 mg/L against a permitted limit of 0.0989 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Zinc, total recoverable
168% over limit
Discharged 0.26500001 mg/L against a permitted limit of 0.0989 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total recoverable
63% over limit
Discharged 0.30600001 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
Zinc, total recoverable
680% over limit
Discharged 0.77100004 mg/L against a permitted limit of 0.0989 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total recoverable
628% over limit
Discharged 1.37000007 mg/L against a permitted limit of 0.18820001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
46% over limit
Discharged 0.92100004 MPN/100mL against a permitted limit of 0.63000003 MPN/100mL (WKLY AVG)
DMR, Limited - Numeric Violation
Zinc, total recoverable
74% over limit
Discharged 5.94739995 kg/d against a permitted limit of 3.41407997 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)