Tap Water Results

Is Lafayette, 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 Lafayette.

2 public water systems serve parts of Lafayette. The largest, City of Lafayette, serves 28,700 people. Your water bill names your system.

Largest system

City of Lafayette

28,700 people · Surface water · EPA ID CO0107473

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 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

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.

Lafayette homes and lead pipes

22%
of homes built before 1980 (Colorado 40%, US 50%)
5%
built before 1950 (Colorado 9%)
34%
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 Lafayette city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Lafayette

  • Left Hand Water District
    20,280 people · Surface water · Colorado · reported ZIPs here
    No PFAS above limits

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Broomfield 4 mi
County of Broomfield City and
County of Broomfield City andNone above limits2.5 ppb
Erie 4 mi
Town of Erie
Town of ErieNone above limits2.6 ppb
Westminster 8 mi
City of Westminster
City of WestminsterNone above limits1.3 ppb
Boulder 8 mi
City of Boulder
City of BoulderNone above limits2 ppb
Northglenn 8 mi
City of Northglenn
City of NorthglennNone above limits1.7 ppb
Thornton 10 mi
City of Thornton
City of ThorntonNone above limits2.3 ppb
Lafayette ZIP codes (1)
  • 80026

Questions

Is Lafayette tap water safe to drink?

City of Lafayette 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 Lafayette, CO?

2 public water systems serve parts of Lafayette. The largest is City of Lafayette (28,700 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Lafayette tap water have PFAS?

None detected above EPA's reporting limits. City of Lafayette 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 Lafayette homes have lead pipes?

Census estimates put 22% of Lafayette 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 Lafayette'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.