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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
EPA records for GRAND JUNCTION CITY OF • Updated September 2026
Grade A — based on EPA compliance records, lead testing and PFAS monitoring
GRAND JUNCTION CITY OF has a clean recent record: no health-based violations in the last five years and no lead, PFAS or historical monitoring result that costs it more than a few points.
Yes — by EPA's records, Grand Junction's tap water earns a A: no health-based violations in five years, lead at 8.2 ppb (90th percentile) and no PFAS detected. Lead from home plumbing is the main remaining risk.
By EPA's records, yes. GRAND JUNCTION CITY OF earns a A: no health-based violations in the last five years, a lead 90th-percentile result of 8.2 ppb, and no PFAS detected in UCMR5 sampling. Lead from your own plumbing is the main risk city data cannot see.
GRAND JUNCTION CITY OF's most recent Lead and Copper Rule result (2023-01-01 to 2025-12-31) was 8.2 ppb at the 90th percentile, below EPA's 15 ppb action level. Because lead usually comes from service lines and household plumbing, homes built before 1986 should still test at the tap.
No. None of the 116 UCMR5 PFAS results for GRAND JUNCTION CITY OF (2024-06-26 to 2025-03-12) were at or above the reporting limit of roughly 3–5 ppt.
GRAND JUNCTION CITY OF has 4 violations on file since 2016: 0 health-based in the last five years and 0 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
GRAND JUNCTION CITY OF reports surface water as its primary source and serves about 26,000 people (EPA PWSID CO0139321).
Optional but sensible. The findings on this page are below federal limits; an NSF-certified pitcher or under-sink filter handles lead and improves taste.
Want to know what's really in your Grand Junction tap water?
Lead was found at 8.2 ppb (90th percentile) in Grand Junction's latest tap sampling — below the action level, but there is no safe level of lead.
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GRAND JUNCTION CITY OF · SDWIS records since 2016 · 5-year window starts 2021-09-07
EPA records no health-based violations for this system in the last five years.
| Violation | Category | Compliance period | Status |
|---|---|---|---|
| Monitoring, Source Water (LT2)E. COLI | Monitoring & reporting | 2018-01-01 → 2018-01-31 | Resolvedreturned 2018-01-31 |
| Monitoring, Source Water (LT2)E. COLI | Monitoring & reporting | 2016-11-01 → 2016-11-30 | Resolvedreturned 2016-11-30 |
| Monitoring, Source Water (LT2)Cryptosporidium | Monitoring & reporting | 2016-11-01 → 2016-11-30 | Resolvedreturned 2016-11-30 |
| Monitoring, Source Water (LT2)Turbidity | Monitoring & reporting | 2016-11-01 → 2016-11-30 | Resolvedreturned 2016-11-30 |
Source: ECHO SDWA bulk download (SDWA_VIOLATIONS_ENFORCEMENT.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-06)
EPA Lead and Copper Rule 90th-percentile results reported by GRAND JUNCTION CITY OF
Below the action level, but detectable. In the most recent monitoring period on file (2023-01-01 to 2025-12-31), 90% of the homes GRAND JUNCTION CITY OF sampled had lead at or below 8.2 ppb.
EPA's action level is 15 ppb (dropping to 10 ppb under the 2024 Lead and Copper Rule Improvements). There is no safe level of lead; the 90th-percentile figure describes the system, not your tap — homes with lead service lines or pre-1986 plumbing can be higher.
| Monitoring period | Lead 90th percentile | vs 15 ppb action level |
|---|---|---|
| 2023-01-01 → 2025-12-31 | 8.2 ppb | Below the action level, but detectable |
| 2021-01-01 → 2021-12-31 | 9.5 ppb | Below the action level, but detectable |
| 2020-01-01 → 2020-12-31 | 8.5 ppb | Below the action level, but detectable |
| 2019-01-01 → 2019-12-31 | 7.1 ppb | Below the action level, but detectable |
| 2018-01-01 → 2018-12-31 | 7.8 ppb | Below the action level, but detectable |
| 2017-01-01 → 2017-12-31 | 8.5 ppb | Below the action level, but detectable |
| 2014-01-01 → 2016-12-31 | 3.9 ppb | Well below the 15 ppb action level |
| 2011-01-01 → 2013-12-31 | 5 ppb | Below the action level, but detectable |
| 2008-01-01 → 2010-12-31 | 6.2 ppb | Below the action level, but detectable |
| 2005-01-01 → 2007-12-31 | 10.7 ppb | Below the action level, but detectable |
| 2002-01-01 → 2004-12-31 | 8 ppb | Below the action level, but detectable |
| 1999-01-01 → 1999-12-31 | 6 ppb | Below the action level, but detectable |
Source: ECHO SDWA bulk download (SDWA_LCR_SAMPLES.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-06)
EPA UCMR5 monitoring, 2024-06-26 to 2025-03-12 · 116 PFAS results at entry points to the distribution system
No PFAS detected. None of the 116 UCMR5 PFAS results for GRAND JUNCTION CITY OF were at or above the method reporting limit. Reporting limits are about 3–5 ppt, so “not detected” means below that threshold — not proven zero.
| Compound | Detects / samples | Max (ppt) | Reporting limit | EPA MCL |
|---|---|---|---|---|
| PFOA | 0 / 4 | < 4 | 4 ppt | 4 ppt |
| PFOS | 0 / 4 | < 4 | 4 ppt | 4 ppt |
| PFHxS | 0 / 4 | < 3 | 3 ppt | 10 ppt |
| PFNA | 0 / 4 | < 4 | 4 ppt | 10 ppt |
| HFPO-DA | 0 / 4 | < 5 | 5 ppt | 10 ppt |
| PFBS | 0 / 4 | < 3 | 3 ppt | hazard index only |
“< 4 ppt” means below the laboratory reporting limit, not zero. ppt = parts per trillion (ng/L). Results are for finished water leaving the treatment plant.
What PFAS are and how to remove them →
Source: UCMR5 occurrence data, EPA Data Summary July 2026 (UCMR5_All.txt)
EPA Six-Year Review 4 compliance samples for GRAND JUNCTION CITY OF · finished water only · dated data, released 2024
These are the regulated-contaminant samples GRAND JUNCTION CITY OF reported to its state between 2012 and 2019 — the most recent nationwide sample-level dataset EPA has published. Total trihalomethanes (TTHM) is flagged below; the status column explains why. Treat this as history, not today's tap water.
| Contaminant | Samples | Average | Max | EPA limit | Status |
|---|---|---|---|---|---|
| Arsenic | 100 detects | 0 µg/L | ND | 10 µg/LMCL | Not detected |
| Nitrate (as N) | 2010 detects | 0.089 mg/L | 1 mg/L | 10 mg/LMCL | Within MCL |
| Fluoride | 40 | 0.631 mg/L | 0.91 mg/L | 4 mg/LMCL | Within MCL |
| Chromium (total) | 100 detects | 0 µg/L | ND | 100 µg/LMCL | Not detected |
| Total trihalomethanes (TTHM) | 128 | 36.884 µg/L | 88.2 µg/L | 80 µg/LMCL (LRAA) | 1 single sample over MCL; average within limit |
| Haloacetic acids (HAA5) | 128 | 26.718 µg/L | 50.3 µg/L | 60 µg/LMCL (LRAA) | Within MCL |
Averages count non-detects as zero. TTHM and HAA5 limits are locational running annual averages, so a single high sample is not a violation — we grade those on the average only. Lead and copper rows are individual tap samples and are shown for context; compliance (and our score) uses the 90th-percentile result above. LRAA = locational running annual average; ND = not detected.
Source: SYR4 Six-Year Review compliance monitoring data 2012–2019 (released 2024-03)
GRAND JUNCTION CITY OF · 10,108 service lines inventoried · Q2 2026 snapshot
GRAND JUNCTION CITY OF reports 365 service lines that are lead or galvanized-requiring-replacement (3.6% of the lines it has inventoried). A lead service line is the pipe between the water main and a building, so treated water can pick up lead after it leaves the plant — which city-level testing does not capture. Under EPA's Lead and Copper Rule Improvements, utilities must replace lead lines within 10 years starting in 2027.
Source: EPA SDWIS Service Line Inventory (Q2 2026) · PWS ID CO0139321 · See all Colorado lead service lines. We may earn a commission from filters and test kits, at no extra cost to you.
Surface-water systems draw from rivers, lakes or reservoirs and must filter and disinfect, which is why disinfection byproducts (TTHM, HAA5) are the readings to watch.
How to test your tap water and the treatment options that actually fit Grand Junction homes
The most reliable way to know what is actually coming out of your tap is a certified mail-in lab test. City-wide EPA data (like the report above) reflects the water leaving the treatment plant, but contaminants such as lead and copper can be picked up from your own service line and household plumbing — so the water at your Grand Junction faucet can differ from the system average. A state-certified lab measures dozens of contaminants at once with results you can trust; you can also find one near you through the EPA's certified-lab list at epa.gov/dwlabcert. Hardware-store test strips are cheaper and instant, but they only screen for a few basics (chlorine, hardness, pH, and a rough lead pass/fail) and are far less accurate — treat them as a first look, not a diagnosis.
Match the treatment to what your test finds. Reverse osmosis (RO) removes the widest range of contaminants — lead, arsenic, nitrate, PFAS, and dissolved solids — which makes an under-sink reverse osmosis system the most thorough choice for Grand Junction households with heavy-metal or PFAS concerns. If your main issue is taste, odor, or chlorine, an activated carbon filter (pitcher, faucet, or under-sink) is simpler and cheaper and handles chlorine and many organic compounds well, though carbon alone does not remove arsenic, nitrate, or most PFAS. NSF-certified pitchers rated for lead reduction are the easiest way to start today while you decide on a permanent setup.
We may earn a commission from testing kits and filters purchased through these links, at no extra cost to you.
Grand Junction ranks #17 of 35 graded Colorado cities.
By EPA's records, yes. GRAND JUNCTION CITY OF earns a A: no health-based violations in the last five years, a lead 90th-percentile result of 8.2 ppb, and no PFAS detected in UCMR5 sampling. Lead from your own plumbing is the main risk city data cannot see.
GRAND JUNCTION CITY OF's most recent Lead and Copper Rule result (2023-01-01 to 2025-12-31) was 8.2 ppb at the 90th percentile, below EPA's 15 ppb action level. Because lead usually comes from service lines and household plumbing, homes built before 1986 should still test at the tap.
No. None of the 116 UCMR5 PFAS results for GRAND JUNCTION CITY OF (2024-06-26 to 2025-03-12) were at or above the reporting limit of roughly 3–5 ppt.
GRAND JUNCTION CITY OF has 4 violations on file since 2016: 0 health-based in the last five years and 0 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
GRAND JUNCTION CITY OF reports surface water as its primary source and serves about 26,000 people (EPA PWSID CO0139321).
Optional but sensible. The findings on this page are below federal limits; an NSF-certified pitcher or under-sink filter handles lead and improves taste.
Lead was found at 8.2 ppb (90th percentile) in Grand Junction's latest tap sampling — below the action level, but there is no safe level of lead.
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