KELSO WWTF
NPDES ID: MO0115118
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: 5 effluent violations.
Violations
May 31, 2026
Solids, total suspended
13% over limit
Discharged 79 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
37% over limit
Discharged 52 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
April 30, 2026
BOD, 5-day, percent removal
20% over limit
Discharged 58 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
18% over limit
Discharged 53.2 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
29% over limit
Discharged 55 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
519% over limit
Discharged 16.7 mg/L against a permitted limit of 2.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
11% over limit
Discharged 61 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
65% over limit
Discharged 16.7 mg/L against a permitted limit of 10.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
384% over limit
Discharged 15 mg/L against a permitted limit of 3.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
24% over limit
Discharged 15 mg/L against a permitted limit of 12.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
124% over limit
Discharged 6.94 mg/L against a permitted limit of 3.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, suspended percent removal
14% over limit
Discharged 60 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
October 31, 2025
Solids, suspended percent removal
6% over limit
Discharged 63 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, total suspended
6% over limit
Discharged 74 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Solids, total suspended
3% over limit
Discharged 72 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
17% over limit
Discharged 59 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
19% over limit
Discharged 1.07 mg/L against a permitted limit of 0.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
30% over limit
Discharged 1.69 mg/L against a permitted limit of 1.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
114% over limit
Discharged 25 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
177% over limit
Discharged 3 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
262% over limit
Discharged 7.61 mg/L against a permitted limit of 2.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
BOD, 5-day, 20 deg. C
7% over limit
Discharged 69.4 mg/L against a permitted limit of 65 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
74% over limit
Discharged 39 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
66% over limit
Discharged 4.48 mg/L against a permitted limit of 2.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
54% over limit
Discharged 69.4 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Solids, suspended percent removal
63% over limit
Discharged 43 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
181% over limit
Discharged 8.71 mg/L against a permitted limit of 3.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
226% over limit
Discharged 10.1 mg/L against a permitted limit of 3.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total suspended
37% over limit
Discharged 96 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
34% over limit
Discharged 3.63 mg/L against a permitted limit of 2.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
186% over limit
Discharged 0 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
November 30, 2024
Solids, suspended percent removal
54% over limit
Discharged 46 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, total suspended
80% over limit
Discharged 126 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
15% over limit
Discharged 126 mg/L against a permitted limit of 110 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Solids, total suspended
136% over limit
Discharged 260 mg/L against a permitted limit of 110 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
271% over limit
Discharged 260 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
186% over limit
Discharged 0 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
September 30, 2024
Solids, total suspended
55% over limit
Discharged 170 mg/L against a permitted limit of 110 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
143% over limit
Discharged 170 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
91% over limit
Discharged 33 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
August 31, 2024
Nitrogen, ammonia total [as N]
236% over limit
Discharged 3.02 mg/L against a permitted limit of 0.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
pH
0% over limit
Discharged 9.25 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
3% over limit
Discharged 64 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)