VILLAGE OF DELTA WASTEWATER TREATMENT PLANT
NPDES ID: OH0020974
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: 15 effluent violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
407% over limit
Discharged 4.66 mg/L against a permitted limit of 0.92 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
11% over limit
Discharged 4.8 mg/L against a permitted limit of 5.4 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Solids, total suspended
110% over limit
Discharged 42 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
36% over limit
Discharged 75 kg/d against a permitted limit of 55 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
83% over limit
Discharged 150 kg/d against a permitted limit of 82 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
143% over limit
Discharged 73 mg/L against a permitted limit of 30 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
265% over limit
Discharged 6.14 kg/d against a permitted limit of 1.68 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
272% over limit
Discharged 9.41 kg/d against a permitted limit of 2.53 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
480% over limit
Discharged 3.54 mg/L against a permitted limit of 0.61 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Copper, total recoverable
57% over limit
Discharged 0.036 mg/L against a permitted limit of 0.023 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
106% over limit
Discharged 0.13 kg/d against a permitted limit of 0.063 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total recoverable
15% over limit
Discharged 0.471 kg/d against a permitted limit of 0.41 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
37% over limit
Discharged 170 kg/d against a permitted limit of 124 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
22% over limit
Discharged 100 kg/d against a permitted limit of 82 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
18% over limit
Discharged 0.13 kg/d against a permitted limit of 0.11 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
21% over limit
Discharged 5.09 mg/L against a permitted limit of 4.2 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
33% over limit
Discharged 40 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
60% over limit
Discharged 72 mg/L against a permitted limit of 45 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
34% over limit
Discharged 110 kg/d against a permitted limit of 82 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
85% over limit
Discharged 230 kg/d against a permitted limit of 124 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
38% over limit
Discharged 16 kg/d against a permitted limit of 11.6 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
83% over limit
Discharged 7.69 mg/L against a permitted limit of 4.2 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
81% over limit
Discharged 5.06 mg/L against a permitted limit of 2.8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
14% over limit
Discharged 13.2 kg/d against a permitted limit of 11.6 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
37% over limit
Discharged 5.75 mg/L against a permitted limit of 4.2 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
23% over limit
Discharged 37 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
11% over limit
Discharged 3.11 mg/L against a permitted limit of 2.8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total suspended
20% over limit
Discharged 36 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total low level
7% over limit
Discharged 0.00000582 mg/L against a permitted limit of 0.00000543 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, total suspended
3% over limit
Discharged 31 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Solids, total suspended
10% over limit
Discharged 33 mg/L against a permitted limit of 30 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
20% over limit
Discharged 24 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Solids, total suspended
10% over limit
Discharged 22 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Solids, total suspended
12% over limit
Discharged 92 kg/d against a permitted limit of 82 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
10% over limit
Discharged 22 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
4% over limit
Discharged 57 kg/d against a permitted limit of 55 kg/d (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Mercury, total low level
74% over limit
Discharged 0.0000261 kg/d against a permitted limit of 0.000015 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
34% over limit
Discharged 110 kg/d against a permitted limit of 82 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total low level
23% over limit
Discharged 0.00000667 mg/L against a permitted limit of 0.00000543 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
53% over limit
Discharged 190 kg/d against a permitted limit of 124 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
March 31, 2025
Solids, total suspended
12% over limit
Discharged 92 kg/d against a permitted limit of 82 kg/d (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
36% over limit
Discharged 5.71 mg/L against a permitted limit of 4.2 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
778% over limit
Discharged 8.08 mg/L against a permitted limit of 0.92 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
454% over limit
Discharged 3.38 mg/L against a permitted limit of 0.61 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
274% over limit
Discharged 9.47 kg/d against a permitted limit of 2.53 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
90% over limit
Discharged 38 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
126% over limit
Discharged 3.8 kg/d against a permitted limit of 1.68 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
147% over limit
Discharged 74 mg/L against a permitted limit of 30 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
September 30, 2024
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 0.58 kg/d (DAILY MX)
DMR, Limited - Overdue
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 0.41 kg/d (MO AVG)
DMR, Limited - Overdue
Zinc, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.21200001 mg/L (DAILY MX)
DMR, Limited - Overdue
Zinc, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.14800001 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
438% over limit
Discharged 4.95 mg/L against a permitted limit of 0.92 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
154% over limit
Discharged 1.55 mg/L against a permitted limit of 0.61 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
116% over limit
Discharged 5.47 kg/d against a permitted limit of 2.53 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
August 31, 2024
pH
0% over limit
Discharged 6.4 SU against a permitted limit of 6.5 SU (DAILY MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
131% over limit
Discharged 5.84 kg/d against a permitted limit of 2.53 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
105% over limit
Discharged 1.25 mg/L against a permitted limit of 0.61 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
15% over limit
Discharged 1.93 kg/d against a permitted limit of 1.68 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
276% over limit
Discharged 3.46 mg/L against a permitted limit of 0.92 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
July 31, 2024
Copper, total recoverable
19% over limit
Discharged 0.0273 mg/L against a permitted limit of 0.023 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
47% over limit
Discharged 0.0932 kg/d against a permitted limit of 0.0632 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
15% over limit
Discharged 0.126 kg/d against a permitted limit of 0.11 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)