DENHAM SPRINGS, CITY OF
NPDES ID: LA0045730
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 12 effluent violations.
Violations
May 31, 2026
Solids, total suspended
160% over limit
Discharged 39 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
25% over limit
Discharged 2.5 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
70% over limit
Discharged 6.8 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
24% over limit
Discharged 6.2 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
363% over limit
Discharged 106.5 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
150% over limit
Discharged 1000 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
Solids, total suspended
32% over limit
Discharged 449.00599623 kg/d against a permitted limit of 340.95399714 kg/d (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Coliform, fecal general
150% over limit
Discharged 1000 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
Solids, total suspended
9% over limit
Discharged 25 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
160% over limit
Discharged 26 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
44% over limit
Discharged 130.29799891 kg/d against a permitted limit of 90.34599924 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
180% over limit
Discharged 14 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
BOD, carbonaceous [5 day, 20 C]
40% over limit
Discharged 14 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
20% over limit
Discharged 409.96199656 kg/d against a permitted limit of 340.95399714 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
193% over limit
Discharged 44 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
8% over limit
Discharged 36.31999969 kg/d against a permitted limit of 33.59599972 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
638% over limit
Discharged 2950 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
Solids, total suspended
583% over limit
Discharged 157 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
135% over limit
Discharged 4.7 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
88% over limit
Discharged 7.5 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
170% over limit
Discharged 13.5 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
107% over limit
Discharged 69.46199942 kg/d against a permitted limit of 33.59599972 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
130% over limit
Discharged 23 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
180% over limit
Discharged 14 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
260% over limit
Discharged 7.2 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
47% over limit
Discharged 133.02199888 kg/d against a permitted limit of 90.34599924 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
January 31, 2026
Nitrogen, ammonia total [as N]
120% over limit
Discharged 74.00199938 kg/d against a permitted limit of 33.59599972 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
168% over limit
Discharged 241.98199797 kg/d against a permitted limit of 90.34599924 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
313% over limit
Discharged 16.5 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
380% over limit
Discharged 24 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
36% over limit
Discharged 543 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
550% over limit
Discharged 65 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
270% over limit
Discharged 7.4 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
BOD, carbonaceous [5 day, 20 C]
10% over limit
Discharged 5.5 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Coliform, fecal general
150% over limit
Discharged 1000 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
Coliform, fecal general
10% over limit
Discharged 220 MPN/100mL against a permitted limit of 200 MPN/100mL (MOAV GEO)
DMR, Limited - Numeric Violation
October 31, 2025
BOD, carbonaceous [5 day, 20 C]
160% over limit
Discharged 13 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
90% over limit
Discharged 19 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
29% over limit
Discharged 2.57 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 4.4 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
38% over limit
Discharged 124.39599895 kg/d against a permitted limit of 90.34599924 kg/d (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
BOD, carbonaceous [5 day, 20 C]
460% over limit
Discharged 28 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
31% over limit
Discharged 524 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
530% over limit
Discharged 63 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
217% over limit
Discharged 286.0199976 kg/d against a permitted limit of 90.34599924 kg/d (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
BOD, carbonaceous [5 day, 20 C]
540% over limit
Discharged 64 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
217% over limit
Discharged 286.47399759 kg/d against a permitted limit of 90.34599924 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
460% over limit
Discharged 28 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
31% over limit
Discharged 524 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
July 31, 2025
BOD, carbonaceous [5 day, 20 C]
46% over limit
Discharged 7.3 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
80% over limit
Discharged 18 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
150% over limit
Discharged 1000 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
June 30, 2025
BOD, carbonaceous [5 day, 20 C]
160% over limit
Discharged 13 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
110% over limit
Discharged 21 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
150% over limit
Discharged 1000 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
27% over limit
Discharged 114.40799904 kg/d against a permitted limit of 90.34599924 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1% over limit
Discharged 34.04999971 kg/d against a permitted limit of 33.59599972 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
204% over limit
Discharged 6.07 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
53% over limit
Discharged 6.1 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Solids, total suspended
139% over limit
Discharged 55 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
45% over limit
Discharged 5.8 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
16% over limit
Discharged 39.04399967 kg/d against a permitted limit of 33.59599972 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
620% over limit
Discharged 36 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
339% over limit
Discharged 396.79599667 kg/d against a permitted limit of 90.34599924 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
29% over limit
Discharged 19.4 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
970% over limit
Discharged 107 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
75% over limit
Discharged 3.5 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
12% over limit
Discharged 37.68199968 kg/d against a permitted limit of 33.59599972 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
155% over limit
Discharged 10.2 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
30% over limit
Discharged 6.5 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
105% over limit
Discharged 4.1 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
BOD, carbonaceous [5 day, 20 C]
17% over limit
Discharged 5.87 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
10% over limit
Discharged 10.95 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
13% over limit
Discharged 2.25 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (7 DA MIN)
DMR, Monitor Only - Overdue
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
Whole Effluent Toxicity [WET] - P. promelas
0% over limit
Discharged 0 % against a permitted limit of 99 % (MO AV MN)
DMR, Limited - Overdue
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO AV MN)
DMR, Monitor Only - Overdue
Whole Effluent Toxicity [WET] - P. promelas
0% over limit
Discharged 0 % against a permitted limit of 99 % (7 DA MIN)
DMR, Limited - Overdue
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (7 DA MIN)
DMR, Monitor Only - Overdue
BOD, carbonaceous [5 day, 20 C]
26% over limit
Discharged 6.3 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
Coef Of Var Static Renewal 7Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (MAXIMUM)
DMR, Monitor Only - Overdue
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
BOD, carbonaceous [5 day, 20 C]
39% over limit
Discharged 13.9 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO AV MN)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
31% over limit
Discharged 5.25 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
January 31, 2025
Solids, total suspended
10% over limit
Discharged 16.48 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
80% over limit
Discharged 41.45 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
150% over limit
Discharged 1000 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
December 31, 2024
BOD, carbonaceous [5 day, 20 C]
57% over limit
Discharged 15.7 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
92% over limit
Discharged 9.6 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
58% over limit
Discharged 6.3 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
37% over limit
Discharged 123.94199896 kg/d against a permitted limit of 90.34599924 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
180% over limit
Discharged 14 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
15% over limit
Discharged 2.3 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
189% over limit
Discharged 28.9 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
360% over limit
Discharged 9.2 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
153% over limit
Discharged 84.89799929 kg/d against a permitted limit of 33.59599972 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
273% over limit
Discharged 14.9 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
325% over limit
Discharged 42.5 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
272% over limit
Discharged 18.6 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
90% over limit
Discharged 171.61199856 kg/d against a permitted limit of 90.34599924 kg/d (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Coliform, fecal general
44% over limit
Discharged 575 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
480% over limit
Discharged 58 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
560% over limit
Discharged 33 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
239% over limit
Discharged 306.44999743 kg/d against a permitted limit of 90.34599924 kg/d (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
BOD, carbonaceous [5 day, 20 C]
240% over limit
Discharged 17 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
50% over limit
Discharged 50.39399958 kg/d against a permitted limit of 33.59599972 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
179% over limit
Discharged 5.58 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
123% over limit
Discharged 8.9 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
230% over limit
Discharged 33 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
66% over limit
Discharged 150.27399874 kg/d against a permitted limit of 90.34599924 kg/d (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Nitrogen, ammonia total [as N]
5% over limit
Discharged 4.2 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
85% over limit
Discharged 3.7 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
16% over limit
Discharged 26.75 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
88% over limit
Discharged 9.4 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
65% over limit
Discharged 16.5 mg/L against a permitted limit of 10 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)