Is Windsor, CO tap water safe?

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

No federal limits exceeded in EPA data for Ft Collins Loveland Water District.

4 public water systems serve parts of Windsor. The largest, Ft Collins Loveland Water District, serves 63,532 people. Your water bill names your system.

Largest system

Ft Collins Loveland Water District

63,532 people · Purchased surface water · EPA ID CO0135292

Buys treated water from Soldier Canyon Filter Plant, North Weld County Water District, City of Loveland, City of Ft Collins.

PFAS	Highest average	Limit	Status
PFOA Not detected	–	4 ppt	Not detected
PFOS Not detected	–	4 ppt	Not detected
PFHxS Not detected	–	10 ppt	Not detected
PFNA Not detected	–	10 ppt	Not detected
HFPO-DA (GenX) Not detected	–	10 ppt	Not 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 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: 0

Full Ft Collins Loveland Water District 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.

Windsor homes and lead pipes

11%

of homes built before 1980 (Colorado 40%, US 50%)

built before 1950 (Colorado 9%)

22%

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. How to check your own line.

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

Other water systems serving Windsor

Little Thompson Water District
25,654 people · Purchased surface water · Colorado · reported ZIPs here
PFOA detected
Town of Windsor
23,500 people · Purchased surface water · Colorado · lists this city
No PFAS above limits
North Weld County Water District
15,890 people · Purchased surface water · Colorado · reported ZIPs here
Lithium above screening level

How nearby cities compare

City	Main water system	PFAS	Lead (90th pct.)
Greeley 9 mi City of Greeley	City of Greeley	None above limits	4 ppb
Loveland 9 mi City of Loveland	City of Loveland	None above limits	3.3 ppb
Fort Collins 9 mi City of Ft Collins	City of Ft Collins	None above limits	2.8 ppb
Longmont 24 mi City of Longmont	City of Longmont	None above limits	1.6 ppb
Erie 31 mi Town of Erie	Town of Erie	None above limits	2.6 ppb
Lafayette 35 mi City of Lafayette	City of Lafayette	None above limits	2 ppb

Windsor ZIP codes (1)

80550

Questions

Is Windsor tap water safe to drink?

Ft Collins Loveland Water District has had no health-based violations 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 Windsor, CO?

4 public water systems serve parts of Windsor. The largest is Ft Collins Loveland Water District (63,532 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Windsor tap water have PFAS?

None detected above EPA's reporting limits. Ft Collins Loveland Water District 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 Windsor homes have lead pipes?

Census estimates put 11% of Windsor 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. Ft Collins Loveland Water District'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.