Stage 1 Disinfectants and DBP Rule violations in Colorado
16 active public water systems in Colorado had a Stage 1 Disinfectants and DBP Rule violation in the past three years, 16 of them in the latest quarter of EPA's data. What Stage 1 Disinfectants and DBP Rule is and why it matters.
Systems with a Stage 1 Disinfectants and DBP Rule violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Advenir French Quarter Denver · Denver County |
3,447 | 2 | 1 | |
|
Center Town of Saguache County |
2,575 | 3 | 1 | |
|
East Alamosa Alamosa County |
1,453 | 1 | 0 | |
|
North Lincoln Wsd Jefferson County |
1,000 | 1 | 1 | |
|
Saguache Town of Saguache County |
504 | 9 | 1 | |
|
Blanca Town of Costilla County |
469 | 2 | 0 | |
|
Fleming Town of Logan County |
446 | 6 | 1 | |
|
Applewood MHC Logan County |
250 | 3 | 0 | |
|
Lazear Domestic WC Delta County |
178 | 8 | 2 | |
|
Crest Mobile Estates MHP El Paso County |
100 | 7 | 7 | |
|
North Washington Wua Adams County |
90 | 6 | 5 | |
|
Minnesota Pipeline Paonia · Delta County |
72 | 5 | 3 | |
|
Escalante Village Durango · La Plata County |
62 | 7 | 5 | |
|
Hartman Town of Prowers County |
61 | 13 | 6 | |
|
Lake Sanchez Estates Costilla County |
34 | 5 | 1 | |
|
Mesa Mobile Park La Plata County |
30 | 5 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Stage 1 Disinfectants and DBP Rule, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Stage 1 Disinfectants and DBP Rule alone.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Colorado records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.