We read 9 results from Lakeside WD’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 35,500 people · Water system ID CA3710013 · 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 |
|---|---|---|---|---|
| Arsenicaverage · range 0.72 to 0.91 · Lakeside wells · 2025 report, page 2 | 0.82 ppb | 0.004 ppb | 10 ppb | Above the health goal205x the health goal |
| Gross alpha (radioactivity)average · range 2.25 to 3.12 · Lakeside wells · 2025 report, page 2 | 2.7 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Uraniumaverage · range 5.81 to 6.11 · printed as 4.0 pCi/L · Lakeside wells · 2025 report, page 2 | 5.96 ppb | 0.6 ppb | 30 ppb | Above the health goal9.9x the health goal |
| Bariumaverage · range 0.14 to 0.19 · printed as 165 ppb · Lakeside wells · 2025 report, page 2 | 0.17 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloraminehighest running annual average · range 1.65 to 2.52 · Distribution system · 2025 report, page 2 | 2.1 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 7.2 · Distribution system · 2025 report, page 2 | 3.5 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 14 to 56 · Distribution system · 2025 report, page 2 | 25.5 ppb | None set | 80 ppb | Below the legal limit |
| Nitrate (as N)average · range 1.2 to 3.3 · Lakeside wells · 2025 report, page 2 | 2.25 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sodiumaverage · range 120 to 150 · Lakeside wells · 2025 report, page 2 | 135 ppm | 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 Lakeside WD’s water between Jul 2023 and Apr 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOS4.8 pptFound in 2 of 6 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS5.8 pptFound in 2 of 6 samples · highest resultNo federal limit in force for this one
- PFBS4.8 pptFound in 2 of 6 samples · highest resultNo federal limit in force for this one
- Lithium31 ppbFound in 6 of 6 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
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.
Radium and uranium
Found: Gross alpha (radioactivity), Uranium
What removes it: Reverse osmosis.
PFAS ("forever chemicals")
Found: PFOS (EPA testing)
What removes it: Reverse osmosis.
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