Is Grand Junction, CO Tap Water Safe? Quality & Contaminants

What was found in Grand Junction's water

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

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	1000 µg/L 10% of the EPA limit 10000 µg/L	3/6	SYR4
Fluoride	910 µg/L 23% of the EPA limit 4000 µg/L	3/6	SYR4
Nitrate-Nitrite	161 µg/L 1.6% of the EPA limit 10000 µg/L	2/6	SYR4
TTHM	88.2 µg/L 110% of the EPA limit, in the worst sample — 80 µg/L	3/6	SYR4
Total Haloacetic Acids (HAA5)	50.3 µg/L 84% of the EPA limit 60 µg/L	3/6	SYR4
Nitrite	50 µg/L 5% of the EPA limit 1000 µg/L	1/6	SYR4
Chloroform	49.6 µg/L No EPA limit set	3/6	SYR4
Barium	41 µg/L 2.1% of the EPA limit 2000 µg/L	2/6	SYR4
Trichloroacetic Acid	26 µg/L No EPA limit set	3/6	SYR4
Dichloroacetic Acid	21.8 µg/L No EPA limit set	3/6	SYR4
Bromodichloromethane	5.69 µg/L No EPA limit set	3/6	SYR4
Dibromoacetic Acid	1.64 µg/L No EPA limit set	3/6	SYR4
Monochloroacetic Acid	1.48 µg/L No EPA limit set	3/6	SYR4
Vinyl Chloride	1.2 µg/L 60% of the EPA limit 2 µg/L	1/6	SYR4
Xylenes, Total	0.8100 µg/L 0% of the EPA limit 10000 µg/L	1/6	SYR4
Dibromochloromethane	0.7800 µg/L No EPA limit set	2/6	SYR4
Toluene	0.5200 µg/L 0.1% of the EPA limit 1000 µg/L	1/6	SYR4
Ethylbenzene	0.2200 µg/L 0% of the EPA limit 700 µg/L	1/6	SYR4
Lead	0.0082 mg/L 55% of the EPA limit 0.0150 mg/L	5/6	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 Grand Junction

Supplier	Population served
UTE WCD	92,580
GRAND JUNCTION CITY OF	26,000
KANNAH CREEK	435
TWIN RIVERS MHP, LLC	67
LITTLE PARK WATER COOP	51
PARK PLACE MHP	35

Frequently asked questions about Grand Junction tap water

Is Grand Junction tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Grand Junction. 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 Grand Junction?

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

What contaminants are in Grand Junction's water?

The contaminants EPA monitoring detected in Grand Junction include Nitrate, Fluoride, Nitrate-Nitrite, TTHM, Total Haloacetic Acids (HAA5). 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.