CITY OF WALLER WWTP
NPDES ID: TX0032476
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
Flow, in conduit or thru treatment plant
9% over limit
Discharged 0.98 MGD against a permitted limit of 0.9 MGD (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
5% over limit
Discharged 10.5 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
83% over limit
Discharged 3.66 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
249% over limit
Discharged 23.7441998 kg/d against a permitted limit of 6.81 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
4% over limit
Discharged 4.15 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
50% over limit
Discharged 22.5 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2026
Flow, in conduit or thru treatment plant
1% over limit
Discharged 0.91 MGD against a permitted limit of 0.9 MGD (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
52% over limit
Discharged 22.8 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total suspended
73% over limit
Discharged 26 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
31% over limit
Discharged 2.62 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
19% over limit
Discharged 2.38 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
25% over limit
Discharged 8.53519993 kg/d against a permitted limit of 6.81 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
94% over limit
Discharged 19.4 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
183% over limit
Discharged 5.65 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
590% over limit
Discharged 13.8 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
94% over limit
Discharged 19.4 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
221% over limit
Discharged 21.83739982 kg/d against a permitted limit of 6.81 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
232% over limit
Discharged 22.60919981 kg/d against a permitted limit of 6.81 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
620% over limit
Discharged 14.4 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
153% over limit
Discharged 25.3 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Solids, total suspended
147% over limit
Discharged 37 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
166% over limit
Discharged 26.6 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1110% over limit
Discharged 24.2 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
47% over limit
Discharged 75.36399937 kg/d against a permitted limit of 51.302 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
563% over limit
Discharged 45.12759962 kg/d against a permitted limit of 6.81 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
63% over limit
Discharged 65 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
464% over limit
Discharged 38.40839968 kg/d against a permitted limit of 6.81 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
200% over limit
Discharged 30 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
3% over limit
Discharged 7.2 mg/L against a permitted limit of 7 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
755% over limit
Discharged 17.1 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
191% over limit
Discharged 19.83979983 kg/d against a permitted limit of 6.81 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
34% over limit
Discharged 13.4 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
415% over limit
Discharged 10.3 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
July 31, 2024
Flow, in conduit or thru treatment plant
2% over limit
Discharged 0.92 MGD against a permitted limit of 0.9 MGD (DAILY AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)