EPCOR – Agua Fria water quality
Surprise, AZ · serves 128,040 people (53,354 connections) · Surface water · Private · EPA ID AZ0407695
Data: U.S. EPA · How we read the data · How we check it
Buys water from Arizona Water Company – White Tanks, City of Surprise – Mountain Vista. 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 30 samples (2023–2025).
- Lithium
- Above screening levelHighest result 95.7 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 level0 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 2024. Your home's pipes can make yours higher.
- Violations
- Resolved2 health-based violations since 2016, most recently Aug 2025.
- 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 EPCOR – Agua Fria'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 (623) 445-2431. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 9 entry points tested Feb 2024 to Nov 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 30 of 30 samples. Highest result 95.7 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: 0 ppb lead (Jan 2022 – Dec 2024). Below action level
Highest since 2016: 14.1 ppb (Dec 2016).
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jan 2022 – Dec 2024 | 0 ppb |
| Jan 2021 – Jun 2021 | 0 ppb |
| Jul 2020 – Dec 2020 | 0 ppb |
Earlier results (9)
| Jan 2020 – Jun 2020 | 0 ppb |
| Jan 2019 – Jun 2019 | 0 ppb |
| Jul 2018 – Dec 2018 | 0 ppb |
| Jan 2014 – Dec 2016 | 14.1 ppb |
| Jan 2011 – Dec 2013 | 0 ppb |
| Jan 2008 – Dec 2010 | 2 ppb |
| Jan 2007 – Dec 2009 | 0 ppb |
| Jan 2005 – Dec 2007 | 0 ppb |
| Jan 2004 – Dec 2006 | 0 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
| When | What happened |
|---|---|
| Aug 2025 | After positive bacteria tests, the system did not complete the required check of what went wrong. EPA record: Revised Total Coliform Rule · Treatment Technique, Level 1 Assessment (RTCR) Resolved |
| Jan 2022 | The water chemistry that keeps lead from dissolving out of pipes was outside the range the state set. EPA record: Lead and Copper Rule · WQP Entry Point/Tap Treatment Technique Non-Compliance (limit TT ) Resolved |
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 | 22 ppb | 300 ppb |
| Molybdenum | 7.4 ppb | 40 ppb |
| Chlorate | 400 ppb | 210 ppb |
| Chromium-6 | 62 ppb | – |
| Vanadium | 35.3 ppb | 21 ppb |
| Strontium | 1.5 ppm | 1.5 ppm |
Where it serves
ZIP codes the system reported serving: 85027, 85340, 85355, 85374, 85379, 85388
Nearby utilities
- City of Peoria Peoria · 11 mi
- Liberty Water Lpsco Litchfield Park · 13 mi · PFAS above limit
- USAF Luke Air Force Base Litchfield Park · 13 mi · PFAS above limit
- City of Glendale Glendale · 18 mi
- City of Phoenix Phoenix · 22 mi
- City of Avondale Avondale · 26 mi · PFAS above limit
Questions
Is EPCOR – Agua Fria water safe to drink?
EPCOR – Agua Fria had 2 health-based violations since 2016, all since resolved. 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 EPCOR – Agua Fria water have PFAS?
EPA tested EPCOR – Agua Fria for 29 PFAS between Feb 2024 and Nov 2024 and none were detected above the reporting limits (about 2 to 20 ppt depending on the chemical).
What is the lead level in EPCOR – Agua Fria water?
The most recent 90th-percentile lead result for EPCOR – Agua Fria is 0 ppb, for the period ending Dec 2024. 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 AZ0407695: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID AZ0407695).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask EPCOR – Agua Fria at (623) 445-2431, 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.