Is Greeley, CO tap water safe?
Supplied by City of Greeley · serves 132,310 people (30,250 connections) · Surface water · EPA ID CO0162321
Data: U.S. EPA · How we read the data · How we check it
Buys water from West Fort Collins Water District, North Weld County Water District, City of Loveland, East Larimer County Water District. Treated water bought from another system can carry that system's contaminants.
Summary
No federal limits exceeded in EPA data.
- PFAS
- Not detectedNone of 29 PFAS found above EPA's reporting limits in 8 samples (2023–2025).
- Lithium
- Above screening levelHighest result 25.7 ppb. EPA uses 10 ppb to decide what to study further. It is not a health limit, and there is no federal limit for lithium. About 1 in 4 systems tested were above it.
- Lead
- Below action level4 ppb (parts per billion) at the 90th percentile: 9 in 10 homes sampled were at or below it. Action level 15 ppb, falling to 10 ppb in Nov 2027. Monitoring period ending Dec 2025. Your home's pipes can make yours higher.
- Violations
- None health-basedNo health-based violations since 2016.
- Built before 1986, or not sure what your service line is made of? Check your service line and test your tap. Utility data can't show your pipes.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read City of Greeley's annual water quality report (Consumer Confidence Report). It lists every regulated contaminant tested and is usually on the utility's website or mailed with your bill, and you can also request it at (970) 350-9836. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 2 entry points tested May 2023 to May 2024. "Average" is the highest entry-point average (non-detects counted as zero), the way EPA compares UCMR 5 results to the limits. ppt = parts per trillion. These results do not determine compliance.
| Contaminant | Highest average |
|---|---|
| PFOA Not detected Limit 4 ppt | – |
| PFOS Not detected Limit 4 ppt | – |
| PFHxS Not detected Limit 10 ppt | – |
| PFNA Not detected Limit 10 ppt | – |
| HFPO-DA (GenX) Not detected Limit 10 ppt | – |
| Hazard Index (a combined score for PFHxS, PFNA, GenX and PFBS, where above 1 is over the limit) Not detected Limit 1 | – |
| PFBS Not detected Guideline 2,000 ppt | – |
| PFBA Not detected Guideline 6,000 ppt | – |
| PFHxA Not detected Guideline 3,000 ppt | – |
29 PFAS tested, 0 detected at least once. "Not detected" means below EPA's reporting limit (about 2 to 20 ppt depending on the chemical), not proven zero. PFAS not listed were not detected. The limits for PFHxS, PFNA, GenX and the Hazard Index were proposed for rescission in May 2026. That proposal is not final. Systems have until 2029 to meet the limits.
Lithium
Detected in 4 of 8 samples. Highest result 25.7 ppb. EPA's non-enforceable screening level is 10 ppb. Above screening level The screening level is how EPA decides what to study further, not a health limit. There is no federal limit for lithium and no filter is certified to remove it. About lithium.
Lead and copper
Latest 90th percentile: 4 ppb lead (Jul 2025 – Dec 2025). Below action level
Highest since 2016: 7.4 ppb (Dec 2022).
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jul 2025 – Dec 2025 | 4 ppb |
| Jan 2025 – Jun 2025 | 3 ppb |
| Jul 2024 – Dec 2024 | 4.9 ppb |
Earlier results (9)
| Jan 2024 – Jun 2024 | 5.9 ppb |
| Jul 2023 – Dec 2023 | 4.2 ppb |
| Jan 2023 – Jun 2023 | 6.9 ppb |
| Jul 2022 – Dec 2022 | 7.4 ppb |
| Jan 2021 – Dec 2021 | 5.5 ppb |
| Jan 2020 – Dec 2020 | 2.8 ppb |
| Jan 2019 – Dec 2019 | 6.4 ppb |
| Jan 2018 – Dec 2018 | 4.6 ppb |
| Jan 2017 – Dec 2017 | 4.3 ppb |
Lead comes from pipes and fixtures, not the source water, so it varies home to home. The 90th percentile means 9 in 10 sampled homes were at or below it. More on lead.
Violations
Health-based violations mean a contaminant exceeded a limit or a required treatment step was missed. Monitoring and reporting violations mean required tests or reports were late or missing, so the water's quality during that time is unknown. The total includes every violation in EPA's records, most of them paperwork.
Earlier EPA testing (2013–2020)
| Contaminant | Highest | Guideline |
|---|---|---|
| Manganese | 6.28 ppb | 300 ppb |
| Chlorate | 110 ppb | 210 ppb |
| Molybdenum | 2.5 ppb | 40 ppb |
| Strontium | 0.77 ppm | 1.5 ppm |
| Chromium-6 | 0.05 ppb | – |
| Vanadium | 0.8 ppb | 21 ppb |
Where it serves
Greeley
ZIP codes the system reported serving: 80512, 80521, 80524, 80525, 80528, 80534, 80535, 80543, 80547, 80550, 80620, 80631, 80634
Nearby utilities
- City of Loveland Loveland · 15 mi
- City of Ft Collins Fort Collins · 18 mi
- Ft Collins Loveland Water District Fort Collins · 18 mi
- City of Longmont Longmont · 24 mi
- City of Brighton Brighton · 31 mi · PFAS above limit
- County of Broomfield City and Broomfield · 35 mi
Questions
Is Greeley tap water safe to drink?
Most of Greeley gets its water from City of Greeley. City of Greeley has no health-based violations since 2016. EPA testing found no PFAS above the federal limits. Federal data can't tell you about your own pipes: lead comes from service lines and plumbing, so test your tap if your home was built before 1986. For the official word, read the utility's annual Consumer Confidence Report.
Does Greeley water have PFAS?
EPA tested City of Greeley for 29 PFAS between May 2023 and May 2024 and none were detected above the reporting limits (about 2 to 20 ppt depending on the chemical).
What is the lead level in Greeley water?
The most recent 90th-percentile lead result for City of Greeley is 4 ppb, for the period ending Dec 2025. The federal action level is 15 ppb, falling to 10 ppb in November 2027. The 90th percentile means 9 in 10 homes sampled were at or below this number. Individual homes can be higher.
Check these numbers yourself
Every figure on this page comes from public EPA records. You don't have to take our word for it:
- EPA's own report for CO0162321: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID CO0162321).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask City of Greeley at (970) 350-9836, or see EPA's guide to finding it.
Found something that doesn't match? Tell us and we'll check it against EPA's records. How we check our data.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.