Cws - Visalia Water Quality (California) – 2025 Report Results

We read 13 results from Cws - Visalia’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.

Serves about 148,496 people · Water system ID CA5410016 · Read the district’s 2025 report (opens in a new tab)

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Results from the 2025 report

Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.

Contaminant	Result	Health goal	Legal limit	What it means
Arsenichighest measured · range ND to 4.5 · Groundwater wells · 2025 report, page 13	4.5 ppb	0.004 ppb	10 ppb	Above the health goal1,125x the health goal
Chromium-6average · range ND to 2.9 · Groundwater wells · 2025 report, page 13	0.97 ppb	0.02 ppb	10 ppb	Above the health goal49x the health goal
Gross alpha (radioactivity)highest measured · range ND to 8.5 · Groundwater wells · 2025 report, page 13	8.5 pCi/L	0 pCi/L	15 pCi/L	Above the health goalThe health goal is zero
Uraniumaverage · range ND to 9.83 · printed as 1.6 pCi/L · Groundwater wells · 2025 report, page 13	2.38 ppb	0.6 ppb	30 ppb	Above the health goal4x the health goal
Chlorineaverage · range ND to 2.7 · Distribution system · 2025 report, page 14	1 ppm	None set	4 ppm	Below the legal limit
Copper90th percentile of 50 homes tested, 0 over the action level · Customer taps (50 sites) · 2025 report, page 13	0.1 ppm	0.3 ppm	1.3 ppm (action level)	Below the health goal
Fluoridehighest measured · range ND to 0.15 · Groundwater wells · 2025 report, page 13	0.15 ppm	1 ppm	2 ppm	Below the health goal
Lead90th percentile of 50 homes tested, 0 over the action level · Customer taps (50 sites) · 2025 report, page 13	Not detected	0.2 ppb	15 ppb (action level)	Not detected
Nitrate (as N)average · range 0.43 to 7.8 · Groundwater wells · 2025 report, page 13	2.5 ppm	10 ppm	10 ppm	Below the health goal
Total dissolved solidsaverage · range 74 to 230 · Groundwater wells · 2025 report, page 14	147 ppm	—	500 ppm guideline	Within the guideline
Hardnessaverage · range 1.17 to 10.5 · Groundwater wells · 2025 report, page 15	4.21 gpg (72 ppm)	—	—	Moderately hard
Sodiumaverage · range 6.6 to 34 · Groundwater wells · 2025 report, page 15	17 ppm	None set	None	No health limit
Vanadiumaverage · range 3.8 to 41 · Groundwater wells · 2025 report, page 15	8.4 ppb	None set	None	No health limit

Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.

EPA testing for PFAS and lithium

EPA’s own nationwide testing (UCMR 5) found these in Cws - Visalia’s water between Jan 2024 and Aug 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.

PFOA4.2 pptFound in 1 of 86 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
PFOS6.9 pptFound in 4 of 86 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
PFBS4.3 pptFound in 2 of 86 samples · highest resultNo federal limit in force for this one

Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.

What you can do

Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.