TOWN OF MAMOU WWTF
NPDES ID: LA0020125
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 9 effluent violations.
Violations
May 31, 2026
Solids, total suspended
4% over limit
Discharged 24 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
5% over limit
Discharged 15.7 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
13% over limit
Discharged 450 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
294% over limit
Discharged 7.88 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
269% over limit
Discharged 16.73443986 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
275% over limit
Discharged 15 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
403% over limit
Discharged 20.1 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
599% over limit
Discharged 13.97 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
219% over limit
Discharged 14.47351988 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
437% over limit
Discharged 24.39795979 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
373% over limit
Discharged 18.9 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
665% over limit
Discharged 15.3 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
397% over limit
Discharged 22.55471981 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
670% over limit
Discharged 15.4 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
363% over limit
Discharged 18.5 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
530% over limit
Discharged 12.59 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
337% over limit
Discharged 19.83979983 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
358% over limit
Discharged 18.3 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
377% over limit
Discharged 21.64217982 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
293% over limit
Discharged 15.7 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
549% over limit
Discharged 12.98 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
46% over limit
Discharged 6.62385994 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
292% over limit
Discharged 7.83 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
160% over limit
Discharged 10.4 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
365% over limit
Discharged 18.6 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
378% over limit
Discharged 9.56 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
130% over limit
Discharged 10.45561991 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
43% over limit
Discharged 2.85 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
79% over limit
Discharged 7.16 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
261% over limit
Discharged 83 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
72% over limit
Discharged 25.86 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
148% over limit
Discharged 4.95 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
10% over limit
Discharged 5.00307996 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
105% over limit
Discharged 8.2 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
173% over limit
Discharged 10.9 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
110% over limit
Discharged 4.19 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
74% over limit
Discharged 40 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
449% over limit
Discharged 10.98 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
288% over limit
Discharged 15.5 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
386% over limit
Discharged 22.05077981 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
70% over limit
Discharged 39 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
129% over limit
Discharged 9.17 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
237% over limit
Discharged 6.74 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
157% over limit
Discharged 11.6587199 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
600% over limit
Discharged 31.77999973 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
253% over limit
Discharged 14.1 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
449% over limit
Discharged 10.97 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
49% over limit
Discharged 2.98 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
130% over limit
Discharged 9.19 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
318% over limit
Discharged 8.36 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
170% over limit
Discharged 10.8 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
285% over limit
Discharged 17.48807985 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
684% over limit
Discharged 35.6026797 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
492% over limit
Discharged 11.83 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
17% over limit
Discharged 27 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
250% over limit
Discharged 14 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
136% over limit
Discharged 9.44 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
255% over limit
Discharged 7.1 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
194% over limit
Discharged 13.35667989 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Nitrogen, ammonia total [as N]
214% over limit
Discharged 6.28 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
94% over limit
Discharged 8.80759993 kg/d against a permitted limit of 4.53999996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
158% over limit
Discharged 10.3 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Nitrogen, ammonia total [as N]
12% over limit
Discharged 2.24 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
13% over limit
Discharged 4.51 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (22 days ago)