Is Northglenn, 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 Northglenn.
City of Northglenn supplies Northglenn (48,927 people).
Water system
City of Northglenn
48,927 people · Surface water · EPA ID CO0101115
| PFAS | Highest average | Limit |
|---|---|---|
| PFOA Not detected | – | 4 ppt |
| PFOS Not detected | – | 4 ppt |
| PFHxS Not detected | – | 10 ppt |
| PFNA Not detected | – | 10 ppt |
| HFPO-DA (GenX) Not detected | – | 10 ppt |
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: 1.7 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.
Northglenn homes and lead pipes
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 Northglenn city (tables B25034, B25003). Estimates for small places have a margin of error.
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Thornton 2 mi City of Thornton | None above limits | 2.3 ppb |
| Broomfield 5 mi County of Broomfield City and | None above limits | 2.5 ppb |
| Westminster 5 mi City of Westminster | None above limits | 1.3 ppb |
| Lafayette 8 mi City of Lafayette | None above limits | 2 ppb |
| Erie 9 mi Town of Erie | None above limits | 2.6 ppb |
| Commerce City 10 mi South Adams County Water & Sanitation District | None above limits | 0 ppb |
Northglenn ZIP codes (2)
- 80233
- 80234
Questions
Is Northglenn tap water safe to drink?
City of Northglenn 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 Northglenn, CO?
City of Northglenn, which serves 48,927 people.
Does Northglenn tap water have PFAS?
None detected above EPA's reporting limits. City of Northglenn 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 Northglenn homes have lead pipes?
Census estimates put 60% of Northglenn 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 Northglenn'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.