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Tap water quality report

Frederick, CO

EPA monitoring detected 10 contaminants across the 2 water suppliers serving Frederick. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

2
water suppliers
17,827
people served
10
contaminants found
Colorado rankings Lead in Colorado PFAS in Colorado

What was found in Frederick's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
TTHM
119.1 µg/L 149%
of the EPA limit, in the worst sample — 80 µg/L
 1/2 SYR4
Total Haloacetic Acids (HAA5)
77.7 µg/L 130%
of the EPA limit, in the worst sample — 60 µg/L
 1/2 SYR4
Chloroform
53.37 µg/L
No EPA limit set
 1/2 SYR4
Dichloroacetic Acid
25.6 µg/L
No EPA limit set
 1/2 SYR4
Trichloroacetic Acid
24.7 µg/L
No EPA limit set
 1/2 SYR4
Monochloroacetic Acid
8.12 µg/L
No EPA limit set
 1/2 SYR4
Bromodichloromethane
4.7 µg/L
No EPA limit set
 1/2 SYR4
Dibromochloromethane
1.71 µg/L
No EPA limit set
 1/2 SYR4
Bromoform
0.5000 µg/L
No EPA limit set
 1/2 SYR4
Lead
0.0029 mg/L 19%
of the EPA limit 0.0150 mg/L
 2/2 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Frederick

SupplierPopulation served
FREDERICK TOWN OF 17,173
PRAIRIE GREENS MHP 654

Frequently asked questions about Frederick tap water

Is Frederick tap water safe to drink?

EPA testing detected 10 contaminants in the water serving Frederick. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Frederick?

2 public water suppliers report drinking-water monitoring for Frederick, Colorado to the EPA. Each is listed above with its population served.

What contaminants are in Frederick's water?

The contaminants EPA monitoring detected in Frederick include TTHM, Total Haloacetic Acids (HAA5), Chloroform, Dichloroacetic Acid, Trichloroacetic Acid. The full list, with the highest level found and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.