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Tap water quality report

Parker, CO

EPA monitoring detected 39 contaminants across the 3 water suppliers serving Parker. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

3
water suppliers
104,145
people served
39
contaminants found
Colorado rankings Lead in Colorado PFAS in Colorado

What was found in Parker'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
Nitrate-Nitrite
2500 µg/L 25%
of the EPA limit 10000 µg/L
 2/3 SYR4
Nitrate
2400 µg/L 24%
of the EPA limit 10000 µg/L
 3/3 SYR4
Fluoride
2020 µg/L 51%
of the EPA limit 4000 µg/L
 3/3 SYR4
Chlorite
350 µg/L 35%
of the EPA limit 1000 µg/L
 1/3 SYR4
Barium
260 µg/L 13%
of the EPA limit 2000 µg/L
 3/3 SYR4
Nitrite
120 µg/L 12%
of the EPA limit 1000 µg/L
 2/3 SYR4
TTHM
57.2 µg/L 72%
of the EPA limit 80 µg/L
 3/3 SYR4
Combined Uranium
31 µg/L 103%
of the EPA limit, in the worst sample — 30 µg/L
 3/3 SYR4
Lithium
29.5 µg/L
No EPA limit set
 3/3 UCMR-5
Gross Alpha, Excl. Radon And U
27.23 pCi/L 182%
of the EPA limit, in the worst sample — 15 pCi/L
 3/3 SYR4
Dibromochloromethane
24 µg/L
No EPA limit set
 3/3 SYR4
Total Haloacetic Acids (HAA5)
20.7 µg/L 35%
of the EPA limit 60 µg/L
 3/3 SYR4
Bromodichloromethane
18.5 µg/L
No EPA limit set
 3/3 SYR4
Bromoform
17.7 µg/L
No EPA limit set
 3/3 SYR4
Gross Beta Particle Activity
13.1 pCi/L
No EPA limit set
 1/3 SYR4
Chloroform
13 µg/L
No EPA limit set
 3/3 SYR4
Dichloroacetic Acid
12 µg/L
No EPA limit set
 3/3 SYR4
Di(2-ethylhexyl) Adipate
11 µg/L 2.8%
of the EPA limit 400 µg/L
 1/3 SYR4
Monochloroacetic Acid
10.7 µg/L
No EPA limit set
 2/3 SYR4
Dibromoacetic Acid
8.9 µg/L
No EPA limit set
 3/3 SYR4
Combined Radium (-226 And -228)
6.5 pCi/L 130%
of the EPA limit, in the worst sample — 5 pCi/L
 2/3 SYR4
Selenium
6.4 µg/L 13%
of the EPA limit 50 µg/L
 2/3 SYR4
Di(2-ethylhexyl) Phthalate
4.6 µg/L 77%
of the EPA limit 6 µg/L
 2/3 SYR4
Toluene
4.6 µg/L 0.5%
of the EPA limit 1000 µg/L
 1/3 SYR4
Trichloroacetic Acid
4.3 µg/L
No EPA limit set
 2/3 SYR4
Arsenic
4.1 µg/L 41%
of the EPA limit 10 µg/L
 3/3 SYR4
Chromium
3 µg/L 3%
of the EPA limit 100 µg/L
 2/3 SYR4
Antimony, Total
2.3 µg/L 38%
of the EPA limit 6 µg/L
 1/3 SYR4
Monobromoacetic Acid
1.2 µg/L
No EPA limit set
 2/3 SYR4
Hexachlorocyclopentadiene
0.0650 µg/L 0.1%
of the EPA limit 50 µg/L
 1/3 SYR4
Pfpea
0.0140 µg/L
No EPA limit set
 3/3 UCMR-5
Pfhxa
0.0119 µg/L
No EPA limit set
 3/3 UCMR-5
Pfba
0.0086 µg/L
No EPA limit set
 2/3 UCMR-5
Hexachlorobenzene
0.0076 µg/L 0.8%
of the EPA limit 1 µg/L
 1/3 SYR4
PFOA
0.0056 µg/L
No EPA limit set
 2/3 UCMR-5
PFBS
0.0053 µg/L
No EPA limit set
 3/3 UCMR-5
PFOS
0.0051 µg/L
No EPA limit set
 1/3 UCMR-5
Pfhpa
0.0031 µg/L
No EPA limit set
 1/3 UCMR-5
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 3/3 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 Parker

SupplierPopulation served
PARKER WSD 75,949
STONEGATE MD 15,295
PINERY WWD 12,901

Frequently asked questions about Parker tap water

Is Parker tap water safe to drink?

EPA testing detected 39 contaminants in the water serving Parker. 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 Parker?

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

What contaminants are in Parker's water?

The contaminants EPA monitoring detected in Parker include Nitrate-Nitrite, Nitrate, Fluoride, Chlorite, Barium. 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.