Is Grand Junction, 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 Ute Water Conservancy District.
3 public water systems serve parts of Grand Junction. The largest, Ute Water Conservancy District, serves 92,580 people. Your water bill names your system.
Largest system
Ute Water Conservancy District
92,580 people · Surface water · EPA ID CO0139791
Buys treated water from Town of Palisade, City of Grand Junction, Clifton Water District.
| 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: 1.4 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.
Grand Junction 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 Grand Junction city (tables B25034, B25003). Estimates for small places have a margin of error.
Which system serves your ZIP code
Based on the ZIP codes each system reported serving. Boundaries don't follow ZIP lines exactly, so your water bill is the final word.
| System | ZIP codes in Grand Junction |
|---|---|
| Ute Water Conservancy District 92,580 people | 81506 |
| City of Grand Junction 26,000 people | 81501 |
Other water systems serving Grand Junction
- City of Grand Junction26,000 people · Surface water · Colorado · lists this cityNo PFAS above limits
- Twin Rivers MHP, LLC67 people · Purchased surface water · Colorado · lists this cityNot in EPA's PFAS sample
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Boulder 189 mi City of Boulder | None above limits | 2 ppb |
| Lakewood 189 mi Consolidated Mutual Maple Grove Water System | None above limits | 3.7 ppb |
| Arvada 190 mi City of Arvada | None above limits | 3.1 ppb |
| Wheat Ridge 191 mi Wheat Ridge Water District | Not tested | – |
| Littleton 193 mi Denver Water Board | None above limits | 3.6 ppb |
| Englewood 195 mi City of Englewood | None above limits | 5 ppb |
Questions
Is Grand Junction tap water safe to drink?
Ute Water Conservancy 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 Grand Junction, CO?
3 public water systems serve parts of Grand Junction. The largest is Ute Water Conservancy District (92,580 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.
Does Grand Junction tap water have PFAS?
None detected above EPA's reporting limits. Ute Water Conservancy 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 Grand Junction homes have lead pipes?
Census estimates put 42% of Grand Junction 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. Ute Water Conservancy 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.