VILLAGE OF COLUMBUS GROVE WWTP
NPDES ID: OH0024759
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: 8 effluent violations.
Violations
May 31, 2026
Copper, total recoverable
180% over limit
Discharged 0.042 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
145% over limit
Discharged 0.071 kg/d against a permitted limit of 0.029 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total low level
26% over limit
Discharged 0.0000528 mg/L against a permitted limit of 0.0000419 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
51% over limit
Discharged 0.071 kg/d against a permitted limit of 0.047 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
347% over limit
Discharged 0.042 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Oxygen, dissolved [DO]
95% over limit
Discharged 0.251 mg/L against a permitted limit of 5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Copper, total recoverable
73% over limit
Discharged 0.026 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
177% over limit
Discharged 0.026 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Copper, total recoverable
155% over limit
Discharged 0.024 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
752% over limit
Discharged 2420 MPN/100mL against a permitted limit of 284 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
114% over limit
Discharged 6.43 mg/L against a permitted limit of 3 mg/L (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
Nitrogen, ammonia total [as N]
79% over limit
Discharged 3.58 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
60% over limit
Discharged 0.024 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
1821% over limit
Discharged 2420 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
54% over limit
Discharged 9.52 kg/d against a permitted limit of 6.2 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
390% over limit
Discharged 49 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oil and grease [soxhlet extr.] tot.
170% over limit
Discharged 27 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
147% over limit
Discharged 0.037 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
294% over limit
Discharged 0.037 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
17% over limit
Discharged 21 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
69% over limit
Discharged 15.7 kg/d against a permitted limit of 9.3 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
52% over limit
Discharged 71 kg/d against a permitted limit of 46.6 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
633% over limit
Discharged 110 mg/L against a permitted limit of 15 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
740% over limit
Discharged 25.2 mg/L against a permitted limit of 3 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
710% over limit
Discharged 16.2 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
6% over limit
Discharged 4.69 mg/L against a permitted limit of 5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
560% over limit
Discharged 13.2 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
28% over limit
Discharged 23 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Copper, total recoverable
294% over limit
Discharged 0.037 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
40% over limit
Discharged 8.67 kg/d against a permitted limit of 6.2 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
567% over limit
Discharged 100 mg/L against a permitted limit of 15 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
31% over limit
Discharged 61 kg/d against a permitted limit of 46.6 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Copper, total recoverable
3% over limit
Discharged 0.03 kg/d against a permitted limit of 0.029 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
147% over limit
Discharged 0.037 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
65% over limit
Discharged 15.3 kg/d against a permitted limit of 9.3 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
25% over limit
Discharged 15 mg/L against a permitted limit of 12 mg/L (MO AVG)
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 (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
25% over limit
Discharged 39 kg/d against a permitted limit of 31.1 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
683% over limit
Discharged 23.5 mg/L against a permitted limit of 3 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
December 31, 2025
Copper, total recoverable
127% over limit
Discharged 0.034 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
75% over limit
Discharged 21 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
262% over limit
Discharged 0.034 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
225% over limit
Discharged 6.49 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
122% over limit
Discharged 40 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 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 (MO AVG)
DMR, Limited - Numeric Violation
Oil and grease [soxhlet extr.] tot.
10% over limit
Discharged 11 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
397% over limit
Discharged 14.9 mg/L against a permitted limit of 3 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
180% over limit
Discharged 42 mg/L against a permitted limit of 15 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
November 30, 2025
Copper, total recoverable
251% over limit
Discharged 0.033 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
17% over limit
Discharged 21 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
25% over limit
Discharged 15 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
120% over limit
Discharged 0.033 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
10% over limit
Discharged 11 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
7% over limit
Discharged 16 mg/L against a permitted limit of 15 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Copper, total recoverable
113% over limit
Discharged 0.02 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
33% over limit
Discharged 0.02 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Copper, total recoverable
87% over limit
Discharged 0.028 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
198% over limit
Discharged 0.028 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total low level
8% over limit
Discharged 0.0000453 mg/L against a permitted limit of 0.0000419 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Mercury, total low level
15% over limit
Discharged 0.0000481 mg/L against a permitted limit of 0.0000419 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
91% over limit
Discharged 0.018 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
20% over limit
Discharged 0.018 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
28% over limit
Discharged 0.012 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Copper, total recoverable
198% over limit
Discharged 0.028 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
87% over limit
Discharged 0.028 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Copper, total recoverable
187% over limit
Discharged 0.027 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
80% over limit
Discharged 0.027 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
23% over limit
Discharged 0.058 kg/d against a permitted limit of 0.047 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
100% over limit
Discharged 0.058 kg/d against a permitted limit of 0.029 kg/d (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Copper, total recoverable
28% over limit
Discharged 0.012 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total low level
41% over limit
Discharged 0.0000592 mg/L against a permitted limit of 0.0000419 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
18% over limit
Discharged 2.35 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
69% over limit
Discharged 5.08 mg/L against a permitted limit of 3 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
138% over limit
Discharged 7.13 mg/L against a permitted limit of 3 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
38% over limit
Discharged 0.013 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
223% over limit
Discharged 6.46 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
480% over limit
Discharged 17.4 mg/L against a permitted limit of 3 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
45% over limit
Discharged 13.5 kg/d against a permitted limit of 9.3 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
46% over limit
Discharged 9.08 kg/d against a permitted limit of 6.2 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
17% over limit
Discharged 0.011 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
490% over limit
Discharged 11.8 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Cadmium, total recoverable
49% over limit
Discharged 0.007 mg/L against a permitted limit of 0.0047 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
7% over limit
Discharged 0.016 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cadmium, total recoverable
180% over limit
Discharged 0.007 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
70% over limit
Discharged 0.016 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Mercury, total low level
74% over limit
Discharged 0.0000731 mg/L against a permitted limit of 0.0000419 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
38% over limit
Discharged 0.013 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
17% over limit
Discharged 0.011 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Copper, total recoverable
6% over limit
Discharged 0.01 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Chlorine, total residual
689% over limit
Discharged 0.15 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
49% over limit
Discharged 0.014 mg/L against a permitted limit of 0.0094 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Cadmium, total recoverable
20% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0025 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)