Is Clifton, CO Tap Water Safe? Quality & Contaminants

What was found in Clifton's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

Contaminant	Level vs EPA limit	Suppliers	Source
Fluoride	1047.5 µg/L 26% of the EPA limit 4000 µg/L Main supplier: CLIFTON WD · 34,500 people · 2019	1/2	SYR4
Nitrate	291 µg/L 2.9% of the EPA limit 10000 µg/L Main supplier: CLIFTON WD · 34,500 people · 2019	1/2	SYR4
Nitrate-Nitrite	279.6 µg/L 2.8% of the EPA limit 10000 µg/L Main supplier: CLIFTON WD · 34,500 people · 2016	1/2	SYR4
Barium	77.5 µg/L 3.9% of the EPA limit 2000 µg/L Main supplier: CLIFTON WD · 34,500 people · 2019	1/2	SYR4
TTHM	71.035 µg/L 89% of the EPA limit 80 µg/L Main supplier: CLIFTON WD · 34,500 people · 2019	2/2	SYR4
Total Haloacetic Acids (HAA5)	57.8 µg/L 96% of the EPA limit 60 µg/L Main supplier: CLIFTON WD · 34,500 people · 2019	2/2	SYR4
Chloroform	47.315 µg/L No EPA limit set Main supplier: CLIFTON WD · 34,500 people · 2019	2/2	SYR4
Trichloroacetic Acid	14.515 µg/L No EPA limit set Main supplier: CLIFTON WD · 34,500 people · 2019 Highest in the city: 17.23 µg/L — CANDLEWOOD PARK · 800 people · 2018	2/2	SYR4
Dichloroacetic Acid	12.223 µg/L No EPA limit set Main supplier: CLIFTON WD · 34,500 people · 2019 Highest in the city: 15 µg/L — CANDLEWOOD PARK · 800 people · 2018	2/2	SYR4
Lithium	14.3 µg/L No EPA limit set Main supplier: CLIFTON WD · 34,500 people · 2023	1/2	UCMR-5
Bromodichloromethane	14.14 µg/L No EPA limit set Main supplier: CLIFTON WD · 34,500 people · 2019	2/2	SYR4
Dibromochloromethane	4.5935 µg/L No EPA limit set Main supplier: CLIFTON WD · 34,500 people · 2019 Highest in the city: 6.685 µg/L — CANDLEWOOD PARK · 800 people · 2018	2/2	SYR4
Monochloroacetic Acid	0.6180 µg/L No EPA limit set Main supplier: CLIFTON WD · 34,500 people · 2019 Highest in the city: 4.38 µg/L — CANDLEWOOD PARK · 800 people · 2018	2/2	SYR4
Dibromoacetic Acid	2.8035 µg/L No EPA limit set Main supplier: CLIFTON WD · 34,500 people · 2019	2/2	SYR4
Arsenic	0.9955 µg/L 10% of the EPA limit 10 µg/L Main supplier: CLIFTON WD · 34,500 people · 2019	1/2	SYR4
Monobromoacetic Acid	0.9700 µg/L No EPA limit set Main supplier: CLIFTON WD · 34,500 people · 2019	1/2	SYR4
Bromoform	0.5000 µg/L No EPA limit set Main supplier: CLIFTON WD · 34,500 people · 2019 Highest in the city: 0.6410 µg/L — CANDLEWOOD PARK · 800 people · 2018	2/2	SYR4
Selenium	0.4400 µg/L 0.9% of the EPA limit 50 µg/L Main supplier: CLIFTON WD · 34,500 people · 2019	1/2	SYR4
Lead	0.0022 mg/L 15% of the EPA limit 0.0150 mg/L Main supplier: CLIFTON WD · 34,500 people · 2025	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 95th percentile of the system's samples — 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 Clifton

Supplier	Population served
CLIFTON WD	34,500
CANDLEWOOD PARK	800

Frequently asked questions about Clifton tap water

Is Clifton tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Clifton. 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 Clifton?

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

What contaminants are in Clifton's water?

The contaminants EPA monitoring detected in Clifton include Fluoride, Nitrate, Nitrate-Nitrite, Barium, TTHM. The full list, with the level at the main supplier 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.