CITY OF COLLINSVILLE WWTP
NPDES ID: TX0034410
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
February 28, 2026
Nitrogen, ammonia total [as N]
73% over limit
Discharged 3.45 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
24% over limit
Discharged 2.47 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
28% over limit
Discharged 12.8 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
130% over limit
Discharged 4.59 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2025
Chlorine, total residual
1% over limit
Discharged 0.99 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
13% over limit
Discharged 16.9 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
October 31, 2025
Chlorine, total residual
11% over limit
Discharged 0.89 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
180% over limit
Discharged 28 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
446% over limit
Discharged 10.92 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
195% over limit
Discharged 29.5 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1194% over limit
Discharged 25.88 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
151% over limit
Discharged 1000 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
133% over limit
Discharged 8.76673993 kg/d against a permitted limit of 3.76819997 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
57% over limit
Discharged 15.7 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
168% over limit
Discharged 5.35 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
228% over limit
Discharged 6.56 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
388% over limit
Discharged 9.75 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
115% over limit
Discharged 8.11297993 kg/d against a permitted limit of 3.76819997 kg/d (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
May 31, 2025
Nitrogen, ammonia total [as N]
87% over limit
Discharged 3.74 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2024
pH
0% over limit
Discharged 10.06 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)