Water Quality in Thornton, CO (80603)
EPA violation data for public water systems serving ZIP code 80603.
Past Health-Based Violations
1 health-based violation was found in the past 5 years, meaning contaminant levels exceeded federal safety limits. All have since been resolved. There are also 19 monitoring/reporting violations.
More violations than 79% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
16,811
Population
13
Water Systems
20
Violations (5yr)
1
Health-Based
Location
Loading map...
Water Systems Serving This Area (13)
Thornton City Of
All resolvedWestminster City Of
All resolvedGreeley City Of
All resolvedSouth Adams County Wsd
Brighton City Of
1 health-basedNorthglenn City Of
Lochbuie Town Of
All resolvedBarr Lake State Park
Mountain States Jatc Training Facility
Sipres Lounge
Djr Well Service Inc
Box Elder Creek Golf Course Snack Bar
Lil Popeyes Tavern
Contaminants Found
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Missed testing deadlines — not a detection of bacteria.
Used to disinfect water — generally safe at regulated levels.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
Thornton (80603) has more violations than 79% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 20.
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.