Tap Water Results

Is Fort Collins, CO tap water safe?

Data: U.S. EPA · How we read the data · How we check it

Summary

No federal limits exceeded in EPA data for City of Ft Collins.

5 public water systems serve parts of Fort Collins. The largest, City of Ft Collins, serves 179,901 people. Your water bill names your system.

Largest system

City of Ft Collins

179,901 people · Surface water · EPA ID CO0135291

Buys treated water from Ft Collins Loveland Water District.

PFASHighest averageLimitStatus
PFOA
Not detected
–4 pptNot detected
PFOS
Not detected
–4 pptNot detected
PFHxS
Not detected
–10 pptNot detected
PFNA
Not detected
–10 pptNot detected
HFPO-DA (GenX)
Not detected
–10 pptNot detected

ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.

Lead: 2.8 ppb at the 90th percentile (Dec 2025, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 1

Full City of Ft Collins results

Across Colorado, 4 of 158 water systems EPA tested had PFAS above a 2024 federal limit, and 2 systems were above the lead action level in results from the last five years. Colorado results.

Fort Collins homes and lead pipes

31%
of homes built before 1980 (Colorado 40%, US 50%)
6%
built before 1950 (Colorado 9%)
48%
of households rent (Colorado 34%)

Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. Renting? Ask your landlord what the service line is made of, because it's their pipe to replace. How to check your own line.

Housing: Census American Community Survey 2020–2024 5-year estimates for Fort Collins city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Fort Collins

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Loveland 9 mi
City of Loveland
City of LovelandNone above limits3.3 ppb
Windsor 9 mi
Ft Collins Loveland Water District
Ft Collins Loveland Water DistrictNone above limits2 ppb
Greeley 18 mi
City of Greeley
City of GreeleyNone above limits4 ppb
Longmont 26 mi
City of Longmont
City of LongmontNone above limits1.6 ppb
Erie 35 mi
Town of Erie
Town of ErieNone above limits2.6 ppb
Boulder 37 mi
City of Boulder
City of BoulderNone above limits2 ppb
Fort Collins ZIP codes (4)
  • 80521
  • 80525
  • 80526
  • 80528

Questions

Is Fort Collins tap water safe to drink?

City of Ft Collins had 1 health-based violation since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.

Who supplies water in Fort Collins, CO?

5 public water systems serve parts of Fort Collins. The largest is City of Ft Collins (179,901 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Fort Collins tap water have PFAS?

None detected above EPA's reporting limits. City of Ft Collins had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.

Do Fort Collins homes have lead pipes?

Census estimates put 31% of Fort Collins homes as built before 1980 (Colorado: 40%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. City of Ft Collins's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.

Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.