CITY OF MARSHALL SOUTHSIDE WWTP
NPDES ID: TX0021784
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: 2 effluent violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
74% over limit
Discharged 6.97 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
76% over limit
Discharged 7.04 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
87% over limit
Discharged 7.47 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
77% over limit
Discharged 7.06 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
95% over limit
Discharged 7.81 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
88% over limit
Discharged 7.51 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
104% over limit
Discharged 8.17 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
120% over limit
Discharged 8.78 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
115% over limit
Discharged 8.59 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
145% over limit
Discharged 9.79 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
37% over limit
Discharged 13.7 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
85% over limit
Discharged 7.41 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
19% over limit
Discharged 4.74 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
4% over limit
Discharged 126.25739894 kg/d against a permitted limit of 121.218 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
44% over limit
Discharged 5.77 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
58% over limit
Discharged 6.33 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
16% over limit
Discharged 140.92159882 kg/d against a permitted limit of 121.218 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
92% over limit
Discharged 7.69 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
55% over limit
Discharged 187.50199842 kg/d against a permitted limit of 121.218 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
104% over limit
Discharged 8.16 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
54% over limit
Discharged 187.04799843 kg/d against a permitted limit of 121.218 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
126% over limit
Discharged 9.04 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrogen, ammonia total [as N]
34% over limit
Discharged 162.48659863 kg/d against a permitted limit of 121.218 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
144% over limit
Discharged 9.76 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
141% over limit
Discharged 9.65 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
2% over limit
Discharged 123.76039896 kg/d against a permitted limit of 121.218 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
36% over limit
Discharged 5.43 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
September 30, 2024
Nitrogen, ammonia total [as N]
30% over limit
Discharged 5.2 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2024
Nitrogen, ammonia total [as N]
19% over limit
Discharged 4.74 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
July 31, 2024
Nitrogen, ammonia total [as N]
98% over limit
Discharged 7.92 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
14% over limit
Discharged 11.4 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)