Water Quality: Denver, CO
22 water systems • 1,359,013 people served
Multiple Health ViolationsWater Quality Summary
Denver is served by 22 public water systems with a combined service population of 1,359,013 people, and has 428 EPA Safe Drinking Water Act violations on record. Critically, 6 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Denver's violation count is 214% above the national average for Colorado. Contaminants associated with violations include Chlorine, Selenium.
Contaminants Found
Eye and nose irritation at high levels; long-term exposure above the MCL may cause liver and kidney damage.
Common source: Water treatment disinfectant added to kill harmful microorganisms
EPA limit: 4.0 mg/L (MRDL — Maximum Residual Disinfectant Level)
Hair loss, nail brittleness, and nervous system damage at elevated concentrations.
Common source: Natural geological deposits, mining discharges, oil refinery waste
EPA limit: 0.05 mg/L (50 ppb)
Water Systems Serving Denver
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| DENVER WATER BOARD | CO0116001 | Surface Water | 1,287,000 | 104 |
| CRESTVIEW WSD | CO0101040 | Surface Water | 23,756 | 0 |
| CHERRY CREEK VALLEY WSD | CO0116175 | Surface Water | 22,000 | 0 |
| NORTH WASHINGTON STREET WSD | CO0101105 | Surface Water | 14,500 | 3 |
| ADVENIR FRENCH QUARTER | CO0116104 | Surface Water | 3,447 | 50 |
| NORTH PECOS WSD | CO0116553 | Surface Water | 2,500 | 0 |
| EASTERN ADAMS CO MD | CO0101234 | Groundwater | 2,485 | 8 |
| NORTH LINCOLN WSD | CO0116552 | Surface Water | 1,000 | 2 |
| MCDONALD FARMS ENTERPRISES INC | CO0207500 | Surface Water | 772 | 26 |
| LAMPLIGHTER MOBILE HOME PARK | CO0122467 | Surface Water | 420 | 1 |
| CRESTWOOD ESTATES | CO0101187 | Groundwater | 140 | 2 |
| MEADOWOOD VILLAGE MHP | CO0103506 | Surface Water | 125 | 4 |
| FOXHILL MD | CO0118285 | Groundwater | 123 | 0 |
| PLEASANT VIEW ESTATES | CO0130604 | Surface Water | 122 | 7 |
| SUBURBAN ESTATES MHP | CO0101725 | Surface Water | 115 | 4 |
| COUNTRY HOMES LAND CO | CO0103186 | Surface Water | 100 | 0 |
| PINON PINES PROPERTY LLC | CO0108050 | Groundwater | 100 | 2 |
| EXCELL LAWSON VILLAGE | CO0110025 | Groundwater | 90 | 29 |
| DEEP CREEK CREEDE HAVEN | CO0140600 | Groundwater | 86 | 23 |
| VALLEY VISTA ESTATES | CO0101800 | Groundwater | 51 | 23 |
| VALLI HI MHP | CO0110045 | Groundwater | 50 | 4 |
| DEEP CREEK MOUNTAIN VALLEY ESTATES | CO0140187 | Groundwater | 31 | 136 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Colorado
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.