INDIAN HOT SPRINGS SPA AND LODGE
NPDES ID: CO0048984
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: 5 effluent violations.
Violations
June 30, 2026
Chlorine, total residual
17479% over limit
Discharged 3.34 mg/L against a permitted limit of 0.019 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Chlorine, total residual
2355% over limit
Discharged 0.27 mg/L against a permitted limit of 0.011 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 5.52 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
May 31, 2026
Chlorine, total residual
21900% over limit
Discharged 4.18 mg/L against a permitted limit of 0.019 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Chlorine, total residual
5536% over limit
Discharged 0.62 mg/L against a permitted limit of 0.011 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Static Renewal 7 Day Chronic Ceriodaphnia dubia
47% over limit
Discharged 36.8 toxic against a permitted limit of 69 toxic (MN VALUE)
DMR, Limited - Numeric Violation
October 31, 2025
Chlorine, total residual
111% over limit
Discharged 0.04 mg/L against a permitted limit of 0.019 mg/L (INST MAX)
DMR, Limited - Overdue
Chlorine, total residual
111% over limit
Discharged 0.04 mg/L against a permitted limit of 0.019 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Chlorine, total residual
27% over limit
Discharged 0.014 mg/L against a permitted limit of 0.011 mg/L (30DA AVG)
DMR, Limited - Overdue
Chlorine, total residual
27% over limit
Discharged 0.014 mg/L against a permitted limit of 0.011 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Chlorine, total residual
82% over limit
Discharged 0.02 mg/L against a permitted limit of 0.011 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
216% over limit
Discharged 0.06 mg/L against a permitted limit of 0.019 mg/L (INST MAX)
DMR, Limited - Overdue
Chlorine, total residual
216% over limit
Discharged 0.06 mg/L against a permitted limit of 0.019 mg/L (INST MAX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 5.9 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
August 31, 2025
Chlorine, total residual
0% over limit
Discharged 0.003 mg/L against a permitted limit of 0.011 mg/L (30DA AVG)
DMR, Limited - Overdue
Chlorine, total residual
58% over limit
Discharged 0.03 mg/L against a permitted limit of 0.019 mg/L (INST MAX)
DMR, Limited - Overdue
Chlorine, total residual
58% over limit
Discharged 0.03 mg/L against a permitted limit of 0.019 mg/L (INST MAX)
DMR, Limited - Numeric Violation
July 31, 2025
pH
0% over limit
Discharged 2.5 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
June 30, 2025
pH
0% over limit
Discharged 1.4 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
May 31, 2025
pH
0% over limit
Discharged 5.3 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
April 30, 2025
pH
0% over limit
Discharged 2.1 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
March 31, 2025
pH
0% over limit
Discharged 9.5 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 4.5 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
February 28, 2025
pH
0% over limit
Discharged 4.8 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
December 31, 2024
Static Renewal 7 Day Chronic Ceriodaphnia dubia
28% over limit
Discharged 49.9 toxic against a permitted limit of 69 toxic (MN VALUE)
DMR, Limited - Numeric Violation
September 30, 2024
pH
0% over limit
Discharged 5.5 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
August 31, 2024
pH
0% over limit
Discharged 5.7 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (5 hours ago)