Yucaipa Valley Water District water quality
Yucaipa, CA · serves 52,202 people (13,656 connections) · Surface water · Local government · EPA ID CA3610055
Data: U.S. EPA · How we read the data · How we check it
Buys water from Western Heights Water Company, South Mesa Water Company. Treated water bought from another system can carry that system's contaminants.
Summary
No federal limits exceeded in EPA data.
- PFAS
- Detected, below limit4 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
- Resolved5 health-based violations since 2016, most recently Mar 2026. 3 required an urgent public notice within 24 hours (the kind behind boil-water notices), most recently Apr 2023. What to do if you get a notice.
- 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.
- Got a boil-water or do-not-drink notice? What each notice means and what to do.
- Pregnant, or mixing baby formula with tap water? Nitrate is most harmful to babies under 6 months, and boiling concentrates it. Consider bottled water or a filter certified for nitrate for formula, and ask your doctor. Health effects.
- 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 Yucaipa Valley Water District'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 (909) 797-5119. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 16 entry points tested Oct 2023 to Jul 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 | 2.1 ppt 52% of the limit |
| 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) Detected, below limit Limit 1 | 0.0047 |
| PFBS Detected, below limit Guideline 2,000 ppt | 9.45 ppt |
| PFBA Not detected Guideline 6,000 ppt | – |
| PFHxA Detected, below limit Guideline 3,000 ppt | 6.45 ppt |
| PFPeA Detected, no limit | 7.9 ppt |
29 PFAS tested, 4 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 34 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 2014 – Dec 2016 | 0 ppb |
| Jan 2011 – Dec 2013 | 0 ppb |
| Jan 2008 – Dec 2010 | 0 ppb |
| Jan 2005 – Dec 2007 | 0 ppb |
| Jan 2004 – Dec 2004 | 5 ppb |
| Jan 2002 – Dec 2004 | 0 ppb |
| Jan 2001 – Dec 2001 | 5 ppb |
| Jan 1999 – Dec 2001 | 0 ppb |
Copper 90th percentile: 30 ppm (Dec 1998), action level 1,300 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 |
|---|---|
| Mar 2026 | The system did not filter its surface water as required, a protection against germs like Giardia and Cryptosporidium. EPA record: Long Term 2 Enhanced Surface Water Treatment Rule · Failure to Filter (SWTR) (limit ) Resolved |
| Jul 2024 | The running annual average for TTHM was above the legal limit. EPA record: TTHM · Maximum Contaminant Level Violation, Average · measured 81.8 ug/l (limit 0.080 mg/L) Resolved |
| Jul 2019 – Apr 2023 2 times | A Nitrate sample was above the legal limit. Urgent public notice required What that means EPA record: Nitrate · Maximum Contaminant Level Violation, Single Sample · measured 12 mg/l (limit 10 mg/L) Resolved |
| Jul 2019 | The running annual average for Nitrate was above the legal limit. Urgent public notice required What that means EPA record: Nitrate · Maximum Contaminant Level Violation, Average · measured 11 mg/l (limit 10 mg/L) 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 | 220 ppb | 300 ppb |
| 1,4-Dioxane | 0.3 ppb | 0.35 ppb |
| Vanadium | 59 ppb | 21 ppb |
| Molybdenum | 21 ppb | 40 ppb |
| Strontium | 0.34 ppm | 1.5 ppm |
| Chlorate | 440 ppb | 210 ppb |
| Chromium-6 | 6.6 ppb | – |
Where it serves
Yucaipa, Calimesa
ZIP codes the system reported serving: 92320, 92399
Nearby utilities
- Redlands City Municipal Utility District – Water Division Redlands · 7 mi · PFAS above limit
- East Valley Water District Highland · 9 mi · PFAS above limit
- Beaumont Cherry Valley Water District Beaumont · 12 mi
- Running Springs Water District Running Springs · 13 mi · PFAS above limit
- City of San Bernardino San Bernardino · 16 mi
- City of Colton Colton · 16 mi · PFAS above limit
Questions
Is Yucaipa Valley Water District water safe to drink?
Yucaipa Valley Water District had 5 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 Yucaipa Valley Water District water have PFAS?
Yes. EPA's 2023–2025 testing of Yucaipa Valley Water District found 4 PFAS at least once. None of the averages were above the federal limits.
What is the lead level in Yucaipa Valley Water District water?
The most recent 90th-percentile lead result for Yucaipa Valley Water District 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 CA3610055: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID CA3610055).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask Yucaipa Valley Water District at (909) 797-5119, 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.