Haloacetic Acids
Approaching LimitDetected level
33.7931 ug/L
0%EPA Limit (60 ug/L)
56% of EPA limit
Health effects: Disinfection byproducts associated with increased cancer risk and potential reproductive effects.
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Tap Water Safety Report for Parker, Colorado
Parker, Colorado tap water scored 53/100 (D) based on EPA data. Multiple contaminants are at concerning levels. A water filter is recommended, especially for children and pregnant women.
Overall Score
53/100
Grade: D
Contaminants Tested
8
All within limits
EPA Violations
5
All resolved
Water Source
surface
Surface water
Population Served
56,485
residents
Water Systems
1
serving this area
1 contaminant(s) are approaching EPA limits and should be monitored.
Detected level
33.7931 ug/L
56% of EPA limit
Health effects: Disinfection byproducts associated with increased cancer risk and potential reproductive effects.
Based on Parker's water quality data, here are our specific recommendations:
Parker's water has multiple contaminants at concerning levels. An under-sink reverse osmosis system or a certified multi-stage filter is strongly recommended for drinking and cooking water.
Babies and young children are especially vulnerable to water contaminants. Use filtered or bottled water for mixing formula and for drinking water until filtration is installed.
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)
With a score of 53/100, Parker's tap water has significant quality concerns. We strongly recommend against using unfiltered tap water for babies or young children. Use bottled water or invest in a reverse osmosis filter for any water consumed by children. Infants are especially vulnerable to contaminants like lead and nitrates, which can cause serious developmental and health issues.
Parker's water has been tested for 8 contaminants. None currently exceed EPA maximum contaminant levels. The most notable detections include: Haloacetic Acids (33.7931 ug/L, EPA limit: 60 ug/L — 56% of limit); Nitrate (4.5484 mg/L, EPA limit: 10 mg/L — 46% of limit); Nitrite (0.447 mg/L, EPA limit: 1 mg/L — 45% of limit); Arsenic (0.0041 mg/L, EPA limit: 0.01 mg/L — 41% of limit); Fluoride (1.3376 mg/L, EPA limit: 4 mg/L — 33% 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.
Absolutely. With a water quality score of 53/100, filtering is strongly recommended in Parker. A reverse osmosis (RO) system is the most effective option, removing up to 99% of contaminants. At minimum, use a certified pitcher filter rated for the specific contaminants found in your water. Multiple contaminants at concerning levels make filtration an important health measure.
Parker's water quality score of 53/100 (D) is 19 points below the national average of 72. The city's water comes from surface water sources like rivers and reservoirs. This indicates significant water quality challenges that the city should work to address. You can see how Parker compares to nearby cities in our state rankings.
Detailed contaminant data, violation history, and water system information for Parker.
Find the best water filter for Parker based on detected contaminants and your budget.
See how Parker compares to other cities across Colorado.
See how Parker 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.