TRI-CITIES NORTH REGIONAL WW AUTHORITY
NPDES ID: OH0049646
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: 16 effluent violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
57% over limit
Discharged 99.8 kg/d against a permitted limit of 63.6 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
111% over limit
Discharged 38 mg/L against a permitted limit of 18 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
49% over limit
Discharged 760 kg/d against a permitted limit of 509 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
136% over limit
Discharged 2700 kg/d against a permitted limit of 1146 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
63% over limit
Discharged 44 mg/L against a permitted limit of 27 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
11% over limit
Discharged 20 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
128% over limit
Discharged 219 kg/d against a permitted limit of 96 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
44% over limit
Discharged 1100 kg/d against a permitted limit of 763 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
8% over limit
Discharged 13 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
188% over limit
Discharged 2200 kg/d against a permitted limit of 763 kg/d (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Solids, total suspended
40% over limit
Discharged 1600 kg/d against a permitted limit of 1146 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
8% over limit
Discharged 13 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 510 kg/d against a permitted limit of 509 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
44% over limit
Discharged 26 mg/L against a permitted limit of 18 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
31% over limit
Discharged 1000 kg/d against a permitted limit of 763 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
41% over limit
Discharged 38 mg/L against a permitted limit of 27 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
March 31, 2026
BOD, carbonaceous [5 day, 20 C]
4% over limit
Discharged 790 kg/d against a permitted limit of 763 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
19% over limit
Discharged 910 kg/d against a permitted limit of 763 kg/d (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
110% over limit
Discharged 5.26 mg/L against a permitted limit of 2.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
83% over limit
Discharged 194 kg/d against a permitted limit of 106 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
129% over limit
Discharged 8.72 mg/L against a permitted limit of 3.8 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
74% over limit
Discharged 276 kg/d against a permitted limit of 159 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
49% over limit
Discharged 3.724 mg/L against a permitted limit of 2.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
33% over limit
Discharged 24 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
13% over limit
Discharged 119.5 kg/d against a permitted limit of 106 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
152% over limit
Discharged 9.573 mg/L against a permitted limit of 3.8 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
83% over limit
Discharged 291 kg/d against a permitted limit of 159 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
8% over limit
Discharged 13 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Oxygen, dissolved [DO]
12% over limit
Discharged 5.3 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
October 31, 2025
Oxygen, dissolved [DO]
3% over limit
Discharged 5.8 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
53% over limit
Discharged 147 kg/d against a permitted limit of 96 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
111% over limit
Discharged 4.86 mg/L against a permitted limit of 2.3 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
7% over limit
Discharged 68.1 kg/d against a permitted limit of 63.6 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
42% over limit
Discharged 2.13 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
E. coli, MTEC-MF
19% over limit
Discharged 338 MPN/100mL against a permitted limit of 284 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
July 31, 2025
Chlorine, total residual
711% over limit
Discharged 0.3 mg/L against a permitted limit of 0.037 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
4% over limit
Discharged 100 kg/d against a permitted limit of 96 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
April 30, 2025
BOD, carbonaceous [5 day, 20 C]
5% over limit
Discharged 800 kg/d against a permitted limit of 763 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
March 31, 2025
Oxygen, dissolved [DO]
8% over limit
Discharged 5.55 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
February 28, 2025
Oxygen, dissolved [DO]
5% over limit
Discharged 5.7 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 510 kg/d against a permitted limit of 509 kg/d (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)