Is Azusa, CA tap water safe?
Supplied by Azusa Light and Water · serves 110,044 people (23,394 connections) · Surface water · EPA ID CA1910007
Data: U.S. EPA · How we read the data · How we check it
Buys water from Metropolitan Water District of SO. Cal., Valley County Water District. Treated water bought from another system can carry that system's contaminants.
Summary
No federal limits exceeded in EPA data.
- PFAS
- Detected, below limit3 of 29 PFAS found at least once. All averages below the federal limits.
- 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 Jan 2024 – now, still in progress (results reported so far). 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.
- Want to reduce what was found? Filters for these results.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read Azusa Light and Water'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 (626) 812-5173. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 5 entry points tested Dec 2023 to Dec 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 One sample above limit Limit 4 ppt | 3.85 ppt 96% of the limit |
| PFOS One sample above limit Limit 4 ppt | 2.77 ppt 69% of the limit |
| 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 Detected, below limit Guideline 3,000 ppt | 0.88 ppt |
29 PFAS tested, 3 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
Not detected in 12 samples (reporting limit 9 ppb). About lithium.
Lead and copper
Latest 90th percentile: 0 ppb lead (Jan 2024 – now (in progress)). Below action level
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jan 2024 – now (in progress) | 0 ppb |
| Jan 2021 – Dec 2023 | 0 ppb |
| Jan 2018 – Dec 2020 | 0 ppb |
Earlier results (9)
| Jan 2015 – Dec 2017 | 0 ppb |
| Jan 2012 – Dec 2014 | 0 ppb |
| Jan 2009 – Dec 2011 | 0 ppb |
| Jan 2006 – Dec 2008 | 0 ppb |
| Jan 2006 – Dec 2006 | 5 ppb |
| Jan 2005 – Dec 2005 | 6.1 ppb |
| Jan 2003 – Dec 2005 | 6 ppb |
| Jan 2004 – Dec 2004 | 5 ppb |
| Jan 2002 – Dec 2002 | 5 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 | 4.5 ppb | 300 ppb |
| Molybdenum | 2.4 ppb | 40 ppb |
| Chromium-6 | 0.18 ppb | – |
| Strontium | 0.53 ppm | 1.5 ppm |
| Chlorate | 130 ppb | 210 ppb |
| Vanadium | 1.9 ppb | 21 ppb |
| 1,4-Dioxane | 0.099 ppb | 0.35 ppb |
Where it serves
Azusa
ZIP codes the system reported serving: 91702, 91706, 91722, 91723, 91740, 91741, 91790, 91791, 91793
Nearby utilities
- Valley County Water District Irwindale · 3 mi
- Suburban Water Systems-San Jose Covina · 4 mi
- City of Monrovia Water Dept. Monrovia · 4 mi · PFAS above limit
- Golden State Water Company – Claremont San Dimas · 6 mi · PFAS above limit
- Golden State Water Company – San Dimas San Dimas · 6 mi · PFAS above limit
- City of Arcadia Arcadia · 7 mi · PFAS above limit
Questions
Is Azusa tap water safe to drink?
Most of Azusa gets its water from Azusa Light and Water. Azusa Light and Water 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 Azusa water have PFAS?
Yes. EPA's 2023–2025 testing of Azusa Light and Water found 3 PFAS at least once. None of the averages were above the federal limits.
What is the lead level in Azusa water?
The most recent 90th-percentile lead result for Azusa Light and Water is 0 ppb, for the monitoring period that began Jan 2024 (still in progress). 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 CA1910007: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID CA1910007).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask Azusa Light and Water at (626) 812-5173, 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.