Is Fort Collins, CO Tap Water Safe? Quality & Contaminants

What was found in Fort Collins'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
Fluoride	880 µg/L 22% of the EPA limit 4000 µg/L	2/10	SYR4
Chlorite	737 µg/L 74% of the EPA limit 1000 µg/L	4/10	SYR4
Nitrate	110 µg/L 1.1% of the EPA limit 10000 µg/L	2/10	SYR4
Nitrate-Nitrite	100 µg/L 1% of the EPA limit 10000 µg/L	2/10	SYR4
TTHM	77.9 µg/L 97% of the EPA limit 80 µg/L	6/10	SYR4
Chloroform	71 µg/L No EPA limit set	6/10	SYR4
Total Haloacetic Acids (HAA5)	47.6 µg/L 79% of the EPA limit 60 µg/L	6/10	SYR4
Dichloroacetic Acid	27 µg/L No EPA limit set	5/10	SYR4
Trichloroacetic Acid	22.58 µg/L No EPA limit set	5/10	SYR4
Barium	19.6 µg/L 1% of the EPA limit 2000 µg/L	2/10	SYR4
Bromodichloromethane	18.4 µg/L No EPA limit set	6/10	SYR4
Dibromochloromethane	6.4 µg/L No EPA limit set	4/10	SYR4
Monochloroacetic Acid	5.2 µg/L No EPA limit set	5/10	SYR4
Monobromoacetic Acid	3.3 µg/L No EPA limit set	4/10	SYR4
Dalapon	1.9 µg/L 1% of the EPA limit 200 µg/L	1/10	SYR4
Dibromoacetic Acid	1.59 µg/L No EPA limit set	1/10	SYR4
Selenium	1.3 µg/L 2.6% of the EPA limit 50 µg/L	1/10	SYR4
Di(2-ethylhexyl) Phthalate	0.9600 µg/L 16% of the EPA limit 6 µg/L	1/10	SYR4
Bhc-Gamma	0.0340 µg/L 17% of the EPA limit 0.2000 µg/L	1/10	SYR4
Lead	0.0150 mg/L 100% of the EPA limit 0.0150 mg/L	9/10	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 Fort Collins

Supplier	Population served
FT COLLINS CITY OF	179,901
FT COLLINS LOVELAND WD	63,532
EAST LARIMER COUNTY WD	27,944
CSU MAIN AND WEST HOUSING CAMPUS	27,375
SPRING CANYON WSD	2,320
TIMBER RIDGE MHP	1,736
SKYLINE	402
NUEVA VIDA MOBILE HOME PARK	266
PINEWOOD MOBILE HOME PARK	65
SOLDIER CANYON FILTER PLANT	0

Frequently asked questions about Fort Collins tap water

Is Fort Collins tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Fort Collins. 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 Fort Collins?

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

What contaminants are in Fort Collins's water?

The contaminants EPA monitoring detected in Fort Collins include Fluoride, Chlorite, Nitrate, Nitrate-Nitrite, TTHM. 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.