Water Quality: Lafayette, CO
8 water systems • 32,266 people served
Multiple Health ViolationsWater Quality Summary
Lafayette is served by 8 public water systems with a combined service population of 32,266 people, and has 285 EPA Safe Drinking Water Act violations on record. Critically, 5 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Lafayette's violation count is 109% above the national average for Colorado. Contaminants associated with violations include Chlorine, Chlorine Dioxide, E. coli, Fecal Coliform.
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)
Can cause anemia in infants and young children; may cause nervous system effects at high levels.
Common source: Water treatment disinfectant used to control taste, odor, and microorganisms
EPA limit: 0.8 mg/L
Causes gastrointestinal illness; certain strains (e.g., O157:H7) can cause severe kidney failure and death.
Common source: Fecal contamination from humans or animals entering the water supply
EPA limit: Zero (no E. coli permitted in drinking water)
Indicates direct fecal contamination; associated with diarrhea, cramps, nausea, and potential severe illness.
Common source: Human and animal fecal waste
EPA limit: Zero tolerance (any positive triggers violations)
Water Systems Serving Lafayette
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| LAFAYETTE CITY OF | CO0107473 | Surface Water | 28,700 | 28 |
| ARBORDALE ACRES MHP | CO0107118 | Surface Water | 901 | 12 |
| BOULDER RIDGE MHP | CO0107153 | Surface Water | 897 | 0 |
| SAN LAZARO MFCTD HOUSING COMMUNITY | CO0107701 | Surface Water | 844 | 176 |
| CHEYENNE MOUNTAIN ESTATES MHP | CO0121176 | Surface Water | 472 | 48 |
| SKYLARK MOBILE HOME COMMUNITY | CO0107712 | Surface Water | 342 | 6 |
| LARK MEADOWS WA | CO0107489 | Groundwater | 75 | 2 |
| MAPLE GROVE WD | CO0107502 | Groundwater | 35 | 13 |
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.