RIPLEY SEWAGE TREATMENT PLANT
NPDES ID: OH0020966
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: 18 effluent violations.
Violations
May 31, 2026
Solids, total suspended
33% over limit
Discharged 16 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
67% over limit
Discharged 30 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
12196% over limit
Discharged 29510 MPN/100mL against a permitted limit of 240 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
Solids, total suspended
50% over limit
Discharged 41 kg/d against a permitted limit of 27.3 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
10% over limit
Discharged 5.4 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
1% over limit
Discharged 127 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
April 30, 2026
Coliform, fecal MF, MFC broth, 44.5 C
179% over limit
Discharged 5580 MPN/100mL against a permitted limit of 2000 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
50% over limit
Discharged 18 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
61% over limit
Discharged 29 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
216% over limit
Discharged 6310 MPN/100mL against a permitted limit of 2000 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
300% over limit
Discharged 48 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
267% over limit
Discharged 66 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
54% over limit
Discharged 28 kg/d against a permitted limit of 18.2 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
83% over limit
Discharged 50 kg/d against a permitted limit of 27.3 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
228% over limit
Discharged 59 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
53% over limit
Discharged 4.6 mg/L against a permitted limit of 3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 5.2 SU against a permitted limit of 6.5 SU (DAILY MN)
DMR, Limited - Numeric Violation
Solids, total suspended
59% over limit
Discharged 29 kg/d against a permitted limit of 18.2 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
72% over limit
Discharged 47 kg/d against a permitted limit of 27.3 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
317% over limit
Discharged 50 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
40% over limit
Discharged 6.3 mg/L against a permitted limit of 4.5 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
December 31, 2025
BOD, carbonaceous [5 day, 20 C]
13% over limit
Discharged 17 mg/L against a permitted limit of 15 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
10% over limit
Discharged 20 kg/d against a permitted limit of 18.2 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
242% over limit
Discharged 41 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
5% over limit
Discharged 10.5 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 5.3 SU against a permitted limit of 6.5 SU (DAILY MN)
DMR, Limited - Numeric Violation
Solids, total suspended
17% over limit
Discharged 32 kg/d against a permitted limit of 27.3 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
267% over limit
Discharged 66 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
2% over limit
Discharged 4.61 mg/L against a permitted limit of 4.5 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
November 30, 2025
Coliform, fecal MF, MFC broth, 44.5 C
30% over limit
Discharged 1300 MPN/100mL against a permitted limit of 1000 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
Solids, total suspended
167% over limit
Discharged 32 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
111% over limit
Discharged 38 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
450% over limit
Discharged 11000 MPN/100mL against a permitted limit of 2000 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 5 SU against a permitted limit of 6.5 SU (DAILY MN)
DMR, Limited - Numeric Violation
October 31, 2025
Solids, total suspended
21% over limit
Discharged 22 kg/d against a permitted limit of 18.2 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
38% over limit
Discharged 3.7 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Solids, total suspended
72% over limit
Discharged 47 kg/d against a permitted limit of 27.3 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
239% over limit
Discharged 61 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 5.3 SU against a permitted limit of 6.5 SU (DAILY MN)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
18392% over limit
Discharged 23300 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
Solids, total suspended
242% over limit
Discharged 41 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
16358% over limit
Discharged 39500 MPN/100mL against a permitted limit of 240 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
September 30, 2025
Solids, total suspended
76% over limit
Discharged 32 kg/d against a permitted limit of 18.2 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
573% over limit
Discharged 10.1 mg/L against a permitted limit of 1.5 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
54% over limit
Discharged 42 kg/d against a permitted limit of 27.3 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
30% over limit
Discharged 19.5 mg/L against a permitted limit of 15 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
76150% over limit
Discharged 183000 MPN/100mL against a permitted limit of 240 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
Solids, total suspended
250% over limit
Discharged 42 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
58948% over limit
Discharged 74400 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
37% over limit
Discharged 3.8 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
313% over limit
Discharged 6.28 kg/d against a permitted limit of 1.52 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
67% over limit
Discharged 16.7 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
268% over limit
Discharged 8.39 kg/d against a permitted limit of 2.28 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
183% over limit
Discharged 51 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
717% over limit
Discharged 8.17 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
BOD, carbonaceous [5 day, 20 C]
13% over limit
Discharged 17 mg/L against a permitted limit of 15 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
13317% over limit
Discharged 32200 MPN/100mL against a permitted limit of 240 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
678% over limit
Discharged 7.78 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
38% over limit
Discharged 3.7 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
265% over limit
Discharged 8.33 kg/d against a permitted limit of 2.28 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
158% over limit
Discharged 31 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
17757% over limit
Discharged 22500 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
Solids, total suspended
14% over limit
Discharged 31 kg/d against a permitted limit of 27.3 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
30% over limit
Discharged 13 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
106% over limit
Discharged 37 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
326% over limit
Discharged 6.48 kg/d against a permitted limit of 1.52 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
43% over limit
Discharged 26 kg/d against a permitted limit of 18.2 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
567% over limit
Discharged 10 mg/L against a permitted limit of 1.5 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
July 31, 2025
BOD, carbonaceous [5 day, 20 C]
61% over limit
Discharged 16.1 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
19% over limit
Discharged 21.7 kg/d against a permitted limit of 18.2 kg/d (MO AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
3192% over limit
Discharged 7900 MPN/100mL against a permitted limit of 240 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
2837% over limit
Discharged 3700 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
184% over limit
Discharged 4.32 kg/d against a permitted limit of 1.52 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
118% over limit
Discharged 26.1 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
31% over limit
Discharged 19.6 mg/L against a permitted limit of 15 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
419% over limit
Discharged 5.19 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
413% over limit
Discharged 7.69 mg/L against a permitted limit of 1.5 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
181% over limit
Discharged 6.4 kg/d against a permitted limit of 2.28 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
38% over limit
Discharged 3.7 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Solids, total suspended
67% over limit
Discharged 30 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
June 30, 2025
Solids, total suspended
18% over limit
Discharged 21.3 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
147% over limit
Discharged 3.7 mg/L against a permitted limit of 1.5 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
32% over limit
Discharged 3 kg/d against a permitted limit of 2.28 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
10% over limit
Discharged 5.4 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
191% over limit
Discharged 4.36 mg/L against a permitted limit of 1.5 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
604% over limit
Discharged 1690 MPN/100mL against a permitted limit of 240 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
276% over limit
Discharged 474 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
28% over limit
Discharged 1.28 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
22% over limit
Discharged 4.7 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
59% over limit
Discharged 3.63 kg/d against a permitted limit of 2.28 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
1% over limit
Discharged 12.1 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Coliform, fecal MF, MFC broth, 44.5 C
27% over limit
Discharged 1273 MPN/100mL against a permitted limit of 1000 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
64% over limit
Discharged 16.4 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
72% over limit
Discharged 47 kg/d against a permitted limit of 27.3 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
214% over limit
Discharged 56.5 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
122% over limit
Discharged 10 mg/L against a permitted limit of 4.5 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
22% over limit
Discharged 8.33 kg/d against a permitted limit of 6.82 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
42% over limit
Discharged 3.5 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
202% over limit
Discharged 9.05 mg/L against a permitted limit of 3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
65% over limit
Discharged 7.53 kg/d against a permitted limit of 4.55 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
1350% over limit
Discharged 28990 MPN/100mL against a permitted limit of 2000 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
Solids, total suspended
100% over limit
Discharged 24 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
10% over limit
Discharged 20 kg/d against a permitted limit of 18.2 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
80% over limit
Discharged 27 mg/L against a permitted limit of 15 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
51% over limit
Discharged 6.86 kg/d against a permitted limit of 4.55 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
151% over limit
Discharged 30.1 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
22% over limit
Discharged 8.33 kg/d against a permitted limit of 6.82 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
263% over limit
Discharged 65.4 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
100% over limit
Discharged 54.5 kg/d against a permitted limit of 27.3 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
43% over limit
Discharged 3.4 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
174% over limit
Discharged 8.23 mg/L against a permitted limit of 3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
122% over limit
Discharged 10 mg/L against a permitted limit of 4.5 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
38% over limit
Discharged 25.1 kg/d against a permitted limit of 18.2 kg/d (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
122% over limit
Discharged 10 mg/L against a permitted limit of 4.5 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
76% over limit
Discharged 21.1 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
145% over limit
Discharged 44.1 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
12% over limit
Discharged 3.36 mg/L against a permitted limit of 3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
22% over limit
Discharged 8.33 kg/d against a permitted limit of 6.82 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
34% over limit
Discharged 36.7 kg/d against a permitted limit of 27.3 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
September 30, 2024
Nitrogen, ammonia total [as N]
7% over limit
Discharged 1.6 mg/L against a permitted limit of 1.5 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
August 31, 2024
E. coli, MTEC-MF
5805% over limit
Discharged 7440 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
7450% over limit
Discharged 18120 MPN/100mL against a permitted limit of 240 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)