LAKE CITY WWTF
NPDES ID: CO0040673
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
Violations
March 31, 2026
Nitrogen, ammonia total [as N]
123% over limit
Discharged 40.2 mg/L against a permitted limit of 18 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
176% over limit
Discharged 44.2 mg/L against a permitted limit of 16 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
142% over limit
Discharged 36.3 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2025
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 1571 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 3142 MPN/100mL (MX 7D GM)
DMR, Limited - Numeric Violation
October 31, 2025
BOD, 5-day, 20 deg. C
27% over limit
Discharged 38 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
52% over limit
Discharged 114 mg/L against a permitted limit of 75 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
4% over limit
Discharged 114 mg/L against a permitted limit of 110 mg/L (MX 7D AV)
DMR, Limited - Numeric Violation
September 30, 2025
pH
0% over limit
Discharged 5.99 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
Solids, total suspended
19% over limit
Discharged 89 mg/L against a permitted limit of 75 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
August 31, 2025
E. coli
54% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 1571 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 5.95 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
Solids, total suspended
15% over limit
Discharged 86 mg/L against a permitted limit of 75 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
July 31, 2025
E. coli
54% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 1571 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
June 30, 2025
Solids, total suspended
12% over limit
Discharged 84 mg/L against a permitted limit of 75 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
May 31, 2025
BOD, 5-day, 20 deg. C
40% over limit
Discharged 42 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
26% over limit
Discharged 33.9 mg/L against a permitted limit of 27 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
91% over limit
Discharged 34.3 mg/L against a permitted limit of 18 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
73% over limit
Discharged 27.7 mg/L against a permitted limit of 16 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
41% over limit
Discharged 21.1 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Plant capacity fact. percent of capacity
0% over limit
Discharged 56 % against a permitted limit of 0 % (30DA AVG)
DMR, Monitor Only - Overdue
Oil and grease
0% over limit
Discharged 0 mg/L against a permitted limit of 10 mg/L (INST MAX)
DMR, Limited - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)