COLORADO CITY METRO DISTRICT
NPDES ID: CO0021121
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: 3 effluent violations, 10 compliance schedule violations, 1 single-event violation.
Violations
June 30, 2026
Nitrogen, ammonia total [as N]
20% over limit
Discharged 3.72 mg/L against a permitted limit of 3.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
E. coli
56% over limit
Discharged 394.22 MPN/100mL against a permitted limit of 252 MPN/100mL (MX 7D GM)
DMR, Limited - Numeric Violation
May 31, 2026
Nitrogen, ammonia total [as N]
126% over limit
Discharged 6.55 mg/L against a permitted limit of 2.9 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Mercury, total [as Hg]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
October 31, 2025
E. coli
14% over limit
Discharged 143.18 MPN/100mL against a permitted limit of 126 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
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 (5 months ago)
Last confirmed
September 15, 2026 (5 days ago)