SWAYZEE WWTP, TOWN OF
NPDES ID: IN0037001
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: 6 effluent violations, 3 single-event violations.
Violations
May 31, 2026
Chlorine, total residual
67% over limit
Discharged 0.1 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
10% over limit
Discharged 0.45 mg/L against a permitted limit of 0.5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
April 30, 2026
Chlorine, total residual
6% over limit
Discharged 0.47 mg/L against a permitted limit of 0.5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Chlorine, total residual
667% over limit
Discharged 0.46 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
930% over limit
Discharged 2420 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
17% over limit
Discharged 0.07 mg/L against a permitted limit of 0.06 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
114% over limit
Discharged 65.78459945 kg/d against a permitted limit of 30.6904 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
8% over limit
Discharged 29.46459975 kg/d against a permitted limit of 27.2854 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
219% over limit
Discharged 10.2 mg/L against a permitted limit of 3.2 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
98% over limit
Discharged 4.31299996 kg/d against a permitted limit of 2.1792 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
43% over limit
Discharged 3 mg/L against a permitted limit of 2.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
486% over limit
Discharged 12.9 mg/L against a permitted limit of 2.2 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
140% over limit
Discharged 3.6 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
4% over limit
Discharged 1.08505999 kg/d against a permitted limit of 1.0442 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
161% over limit
Discharged 3.90439997 kg/d against a permitted limit of 1.4982 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
October 31, 2025
Oxygen, dissolved [DO]
5% over limit
Discharged 5.7 mg/L against a permitted limit of 6 mg/L (DLYAVMIN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
9% over limit
Discharged 1.13499999 kg/d against a permitted limit of 1.0442 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
127% over limit
Discharged 3.4 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
191% over limit
Discharged 4.35839996 kg/d against a permitted limit of 1.4982 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
76% over limit
Discharged 220 MPN/100mL against a permitted limit of 125 MPN/100mL (MO GEO)
DMR, Limited - Numeric Violation
Chlorine, total residual
2133% over limit
Discharged 1.34 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
527% over limit
Discharged 13.8 mg/L against a permitted limit of 2.2 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
75% over limit
Discharged 0.105 mg/L against a permitted limit of 0.06 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
930% over limit
Discharged 2420 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
90% over limit
Discharged 0.05 mg/L against a permitted limit of 0.5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
100% over limit
Discharged 4.4 mg/L against a permitted limit of 2.2 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
900% over limit
Discharged 0.6 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
83% over limit
Discharged 0.11 mg/L against a permitted limit of 0.06 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
33% over limit
Discharged 4 mg/L against a permitted limit of 6 mg/L (DLYAVMIN)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
141% over limit
Discharged 301 MPN/100mL against a permitted limit of 125 MPN/100mL (MO GEO)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
47% over limit
Discharged 2.2 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
82% over limit
Discharged 0.09 mg/L against a permitted limit of 0.5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
930% over limit
Discharged 2420 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
13% over limit
Discharged 1.18039999 kg/d against a permitted limit of 1.0442 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
91% over limit
Discharged 2.86019998 kg/d against a permitted limit of 1.4982 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
August 31, 2025
Chlorine, total residual
17% over limit
Discharged 0.07 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
5% over limit
Discharged 5.7 mg/L against a permitted limit of 6 mg/L (DLYAVMIN)
DMR, Limited - Numeric Violation
July 31, 2025
Chlorine, total residual
80% over limit
Discharged 0.1 mg/L against a permitted limit of 0.5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
292% over limit
Discharged 920.8 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
67% over limit
Discharged 0.1 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
0% over limit
Discharged 0.06 mg/L against a permitted limit of 0.06 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
57% over limit
Discharged 2.6 mg/L against a permitted limit of 6 mg/L (DLYAVMIN)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
379% over limit
Discharged 7.17319994 kg/d against a permitted limit of 1.4982 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
83% over limit
Discharged 0.11 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
109% over limit
Discharged 4.6 mg/L against a permitted limit of 2.2 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
47% over limit
Discharged 2.2 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
10% over limit
Discharged 5.4 mg/L against a permitted limit of 6 mg/L (DLYAVMIN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
209% over limit
Discharged 3.22339997 kg/d against a permitted limit of 1.0442 kg/d (MO AVG)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
43% over limit
Discharged 179 MPN/100mL against a permitted limit of 125 MPN/100mL (MO GEO)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
21% over limit
Discharged 24.69759979 kg/d against a permitted limit of 20.4754 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
930% over limit
Discharged 2420 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Chlorine, total residual
17% over limit
Discharged 0.07 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
E. coli, colony forming units [CFU]
183% over limit
Discharged 354 MPN/100mL against a permitted limit of 125 MPN/100mL (MO GEO)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
930% over limit
Discharged 2420 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
117% over limit
Discharged 0.13 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
pH
0% over limit
Discharged 9.1 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (22 days ago)