HELMSBURG RSD WWTP
NPDES ID: IN0058416
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: 2 effluent violations, 5 single-event violations.
Violations
May 31, 2026
E. coli, colony forming units [CFU]
237% over limit
Discharged 792 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
58% over limit
Discharged 3 mg/L against a permitted limit of 1.9 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
21% over limit
Discharged 2.3 mg/L against a permitted limit of 1.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
210% over limit
Discharged 9 mg/L against a permitted limit of 2.9 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
31% over limit
Discharged 0.3632 kg/d against a permitted limit of 0.27694 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
584% over limit
Discharged 13 mg/L against a permitted limit of 1.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1141% over limit
Discharged 36 mg/L against a permitted limit of 2.9 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
97% over limit
Discharged 0.5448 kg/d against a permitted limit of 0.27694 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
1532% over limit
Discharged 31 mg/L against a permitted limit of 1.9 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
67% over limit
Discharged 45 mg/L against a permitted limit of 27 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
977% over limit
Discharged 14 mg/L against a permitted limit of 1.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
48% over limit
Discharged 0.1816 kg/d against a permitted limit of 0.12258 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
100% over limit
Discharged 0.3632 kg/d against a permitted limit of 0.1816 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
50% over limit
Discharged 27 mg/L against a permitted limit of 18 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Solids, total suspended
33% over limit
Discharged 24 mg/L against a permitted limit of 18 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
78% over limit
Discharged 48 mg/L against a permitted limit of 27 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
2% over limit
Discharged 5.9 mg/L against a permitted limit of 6 mg/L (DLYAVMIN)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 12 mg/L against a permitted limit of 23 mg/L (MX WK AV)
DMR, Limited - Overdue
June 30, 2025
Chlorine, total residual
0% over limit
Discharged 0.01 mg/L against a permitted limit of 0.06 mg/L (MO AVG)
DMR, Limited - Overdue
May 31, 2025
Chlorine, total residual
0% over limit
Discharged 0.06 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
0% over limit
Discharged 0.01 mg/L against a permitted limit of 0.06 mg/L (MO AVG)
DMR, Limited - Overdue
E. coli, colony forming units [CFU]
560% over limit
Discharged 1550 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
441% over limit
Discharged 15.7 mg/L against a permitted limit of 2.9 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
7% over limit
Discharged 0.2951 kg/d against a permitted limit of 0.27694 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
258% over limit
Discharged 6.8 mg/L against a permitted limit of 1.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
E. coli, colony forming units [CFU]
330% over limit
Discharged 1010 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)