CITY OF CLARKSVILLE CITY WWTP
NPDES ID: TX0127272
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]
47% over limit
Discharged 22.1 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
331% over limit
Discharged 12.928 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
103% over limit
Discharged 2.20643998 kg/d against a permitted limit of 1.08959999 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
205% over limit
Discharged 3.31873997 kg/d against a permitted limit of 1.08959999 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
34% over limit
Discharged 20.1 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
330% over limit
Discharged 12.9 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
29% over limit
Discharged 19.3 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
29% over limit
Discharged 1.40285999 kg/d against a permitted limit of 1.08959999 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
156% over limit
Discharged 7.67 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2025
Flow, in conduit or thru treatment plant
2% over limit
Discharged 0.096717 MGD against a permitted limit of 0.095 MGD (DAILY AV)
DMR, Limited - Numeric Violation
July 31, 2025
Flow, in conduit or thru treatment plant
14% over limit
Discharged 0.108493 MGD against a permitted limit of 0.095 MGD (DAILY AV)
DMR, Limited - Numeric Violation
June 30, 2025
Flow, in conduit or thru treatment plant
26% over limit
Discharged 0.119971 MGD against a permitted limit of 0.095 MGD (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2024
Flow, in conduit or thru treatment plant
54% over limit
Discharged 0.146078 MGD against a permitted limit of 0.095 MGD (DAILY AV)
DMR, Limited - Numeric Violation
July 31, 2024
Flow, in conduit or thru treatment plant
20% over limit
Discharged 0.11356 MGD against a permitted limit of 0.095 MGD (DAILY AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)