Haloacetic Acids
Approaching LimitDetected level
43.917 ug/L
0%EPA Limit (60 ug/L)
73% of EPA limit
Health effects: Disinfection byproducts associated with increased cancer risk and potential reproductive effects.
Loading water data...
Tap Water Safety Report for Lafayette, Colorado
Lafayette, Colorado tap water scored 65/100 (C+) based on EPA data. While the water meets minimum EPA standards, 2 contaminant(s) are at elevated levels worth monitoring.
Overall Score
65/100
Grade: C+
Contaminants Tested
9
All within limits
EPA Violations
2
All resolved
Water Source
groundwater
Mixed sources
Population Served
31,100
residents
Water Systems
1
serving this area
2 contaminant(s) are approaching EPA limits and should be monitored.
Detected level
43.917 ug/L
73% of EPA limit
Health effects: Disinfection byproducts associated with increased cancer risk and potential reproductive effects.
Detected level
41.5799 ug/L
52% of EPA limit
Health effects: Disinfection byproducts linked to increased risk of bladder cancer and reproductive issues with long-term exposure.
Based on Lafayette's water quality data, here are our specific recommendations:
With 2 contaminant(s) at elevated levels, a certified pitcher or faucet filter provides an affordable layer of protection. Look for NSF/ANSI certification.
City water reports reflect water leaving the treatment plant. Your home pipes may add contaminants, especially in older buildings. Test at the tap for the most accurate picture.
How contaminant levels compare to EPA limits (50% of overall score)
EPA violation history and enforcement actions (30% of overall score)
Water system infrastructure and source quality (20% of overall score)
Lafayette's water scored 65/100 with 2 contaminant(s) at elevated levels. Children are more vulnerable to water contaminants due to their lower body weight and developing systems. We recommend using a certified water filter for any water used for baby formula, cooking for children, or children's drinking water. A pitcher filter with NSF certification is an affordable first step.
Lafayette's water has been tested for 9 contaminants. None currently exceed EPA maximum contaminant levels. The most notable detections include: Haloacetic Acids (43.917 ug/L, EPA limit: 60 ug/L — 73% of limit); Total Trihalomethanes (41.5799 ug/L, EPA limit: 80 ug/L — 52% of limit); Nitrate (3.2169 mg/L, EPA limit: 10 mg/L — 32% of limit); Copper (0.3677 mg/L, EPA limit: 1.3 mg/L — 28% of limit); Fluoride (0.9563 mg/L, EPA limit: 4 mg/L — 24% of limit). The water system has no active EPA violations. Water quality can vary seasonally and by neighborhood, so home testing provides the most accurate picture for your specific tap.
Yes, we recommend filtering your water in Lafayette. With a score of 65/100 and 2 contaminant(s) at elevated levels, a certified water filter adds a meaningful layer of protection. A faucet-mounted or pitcher filter with NSF/ANSI 53 certification is a good starting point. For more thorough contaminant removal, consider an under-sink reverse osmosis system, especially if you have specific concerns about Haloacetic Acids.
Lafayette's water quality score of 65/100 (C+) is 7 points below the national average of 72. The city's water comes from a mix of groundwater and surface water sources. While the water meets minimum federal standards, there is room for improvement compared to top-performing cities. You can see how Lafayette compares to nearby cities in our state rankings.
Detailed contaminant data, violation history, and water system information for Lafayette.
Find the best water filter for Lafayette based on detected contaminants and your budget.
See how Lafayette compares to other cities across Colorado.
See how Lafayette ranks among all cities in the US for water quality.
Data Disclaimer
This report is based on publicly available EPA data and water quality test results. Water quality can vary by neighborhood, building age, and season. This information is for educational purposes and should not replace professional water testing. If you have specific health concerns about your water, contact your local water utility or a certified water testing laboratory. Last data update: February 2, 2026.