LOST LAKE UTILITY DISTRICT STP
NPDES ID: IL0026590
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, 12 permit schedule violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
4275% over limit
Discharged 52.5 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1650% over limit
Discharged 52.5 mg/L against a permitted limit of 3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
133% over limit
Discharged 28 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
72% over limit
Discharged 3.97703997 kg/d against a permitted limit of 2.31539998 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
317% over limit
Discharged 3.97703997 kg/d against a permitted limit of 0.95339999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
17% over limit
Discharged 28 mg/L against a permitted limit of 24 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
42% over limit
Discharged 3.27787997 kg/d against a permitted limit of 2.31539998 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
3333% over limit
Discharged 41.2 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
260% over limit
Discharged 36 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
183% over limit
Discharged 34 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
42% over limit
Discharged 34 mg/L against a permitted limit of 24 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
244% over limit
Discharged 3.27787997 kg/d against a permitted limit of 0.95339999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
80% over limit
Discharged 36 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1273% over limit
Discharged 41.2 mg/L against a permitted limit of 3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
183% over limit
Discharged 34 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
70% over limit
Discharged 5.00761996 kg/d against a permitted limit of 2.95099998 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
100% over limit
Discharged 40 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
324% over limit
Discharged 5.00761996 kg/d against a permitted limit of 1.18039999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
42% over limit
Discharged 34 mg/L against a permitted limit of 24 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
4100% over limit
Discharged 63 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1558% over limit
Discharged 63 mg/L against a permitted limit of 3.8 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
38% over limit
Discharged 5.00761996 kg/d against a permitted limit of 3.63199997 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
300% over limit
Discharged 40 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1240% over limit
Discharged 63 mg/L against a permitted limit of 4.7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
BOD, carbonaceous [5 day, 20 C]
40% over limit
Discharged 28 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
3929% over limit
Discharged 68.5 mg/L against a permitted limit of 1.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
28% over limit
Discharged 5.18921996 kg/d against a permitted limit of 4.04059997 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1217% over limit
Discharged 68.5 mg/L against a permitted limit of 5.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
294% over limit
Discharged 5.18921996 kg/d against a permitted limit of 1.31659999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
180% over limit
Discharged 28 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
200% over limit
Discharged 36 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
50% over limit
Discharged 36 mg/L against a permitted limit of 24 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
3606% over limit
Discharged 63 mg/L against a permitted limit of 1.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
58% over limit
Discharged 38 mg/L against a permitted limit of 24 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1112% over limit
Discharged 63 mg/L against a permitted limit of 5.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
18% over limit
Discharged 4.77153996 kg/d against a permitted limit of 4.04059997 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
217% over limit
Discharged 38 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
262% over limit
Discharged 4.77153996 kg/d against a permitted limit of 1.31659999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total suspended
133% over limit
Discharged 28 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
631% over limit
Discharged 38 mg/L against a permitted limit of 5.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
50% over limit
Discharged 30 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
119% over limit
Discharged 2.87835998 kg/d against a permitted limit of 1.31659999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
2135% over limit
Discharged 38 mg/L against a permitted limit of 1.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
200% over limit
Discharged 30 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
17% over limit
Discharged 28 mg/L against a permitted limit of 24 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
39% over limit
Discharged 1.83415998 kg/d against a permitted limit of 1.31659999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1194% over limit
Discharged 22 mg/L against a permitted limit of 1.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
323% over limit
Discharged 22 mg/L against a permitted limit of 5.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
503% over limit
Discharged 18.1 mg/L against a permitted limit of 3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
58% over limit
Discharged 1.50727999 kg/d against a permitted limit of 0.95339999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1408% over limit
Discharged 18.1 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
33% over limit
Discharged 16 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
23% over limit
Discharged 1.17585999 kg/d against a permitted limit of 0.95339999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
370% over limit
Discharged 14.1 mg/L against a permitted limit of 3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1075% over limit
Discharged 14.1 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
726% over limit
Discharged 9.09 mg/L against a permitted limit of 1.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
203% over limit
Discharged 9.09 mg/L against a permitted limit of 3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
225% over limit
Discharged 9.09 mg/L against a permitted limit of 2.8 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Solids, total suspended
33% over limit
Discharged 16 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
56% over limit
Discharged 4.67 mg/L against a permitted limit of 3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
325% over limit
Discharged 4.67 mg/L against a permitted limit of 1.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
67% over limit
Discharged 4.67 mg/L against a permitted limit of 2.8 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Coliform, fecal general
Limit violation
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
109% over limit
Discharged 5.85 mg/L against a permitted limit of 2.8 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
432% over limit
Discharged 5.85 mg/L against a permitted limit of 1.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
95% over limit
Discharged 5.85 mg/L against a permitted limit of 3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
28% over limit
Discharged 1.22125999 kg/d against a permitted limit of 0.95339999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
107% over limit
Discharged 6.2 mg/L against a permitted limit of 3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
417% over limit
Discharged 6.2 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Solids, total suspended
33% over limit
Discharged 16 mg/L against a permitted limit of 12 mg/L (MO AVG)
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
Nitrogen, ammonia total [as N]
30% over limit
Discharged 3.00093997 kg/d against a permitted limit of 2.31539998 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
125% over limit
Discharged 2.14287998 kg/d against a permitted limit of 0.95339999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
307% over limit
Discharged 12.2 mg/L against a permitted limit of 3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
883% over limit
Discharged 11.8 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
1020% over limit
Discharged 16.8 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
257% over limit
Discharged 16.8 mg/L against a permitted limit of 4.7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
159% over limit
Discharged 3.05541997 kg/d against a permitted limit of 1.18039999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
14% over limit
Discharged 4.13593997 kg/d against a permitted limit of 3.63199997 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
342% over limit
Discharged 16.8 mg/L against a permitted limit of 3.8 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
4% over limit
Discharged 3.05541997 kg/d against a permitted limit of 2.95099998 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
89% over limit
Discharged 2.48337998 kg/d against a permitted limit of 1.31659999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
865% over limit
Discharged 16.4 mg/L against a permitted limit of 1.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
215% over limit
Discharged 16.4 mg/L against a permitted limit of 5.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Coliform, fecal general
Limit violation
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Coliform, fecal general
80% over limit
Discharged 720 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
Nitrogen, ammonia total [as N]
55% over limit
Discharged 1.71 mg/L against a permitted limit of 1.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)