We read 21 results from Sunnyslope County Water Dist’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 24,954 people · Water system ID CA3510003 · 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 ND to 2.6 · sampled 2023 · Groundwater · 2025 report, page 4 | 2.43 ppb | 0.004 ppb | 10 ppb | Above the health goal608x the health goal |
| Gross alpha (radioactivity)average · range 2.58 to 2.58 · sampled 2022 · Groundwater, highest of 2 sources · 2025 report, page 4 | 2.58 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Total dissolved solidsaverage · range 710 to 810 · Groundwater, highest of 2 sources · 2025 report, page 4 | 760 ppm | — | 500 ppm guideline | Above the guideline1.5x the guideline (taste, odor or stains; not a health limit) |
| Uraniumaverage · range 4.62 to 4.62 · printed as 3.1 pCi/L · sampled 2023 · Groundwater · 2025 report, page 4 | 4.62 ppb | 0.6 ppb | 30 ppb | Above the health goal7.7x the health goal |
| Chlorideaverage · range 88 to 130 · Groundwater, highest of 2 sources · 2025 report, page 4 | 109 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.79 to 2.2 · Distribution system · 2025 report, page 4 | 1.21 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 40 homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 4 | 0.08 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 44 · Distribution system · 2025 report, page 4 | 10 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 1.1 to 77 · Distribution system · 2025 report, page 4 | 25 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.22 to 0.37 · sampled 2023 · Groundwater, highest of 2 sources · 2025 report, page 4 | 0.28 ppm | 1 ppm | 2 ppm | Below the health goal |
| Nitrate (as N)average · range 1.3 to 3.3 · sampled 2023 · Groundwater, highest of 2 sources · 2025 report, page 4 | 2.4 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHaverage · range 7.5 to 8.2 · Surface Water, highest of 2 sources · 2025 report, page 4 | 7.92 | — | — | Normal range |
| Sulfateaverage · range 190 to 200 · Groundwater, highest of 2 sources · 2025 report, page 4 | 195 ppm | — | 250 ppm guideline | Within the guideline |
| Turbidity (cloudiness)average · range 0.1 to 0.15 · sampled 2024 · Groundwater · 2025 report, page 4 | 0.1 NTU | None set | 1 NTU | Below the legal limit |
| Alkalinityaverage · range 310 to 330 · Groundwater, highest of 2 sources · 2025 report, page 4 | 320 ppm | None set | None | No health limit |
| Boronaverage · range 0.95 to 1 · printed as 975 ug/L · Groundwater · 2025 report, page 4 | 0.98 ppm | None set | None | No health limit |
| Calciumaverage · range 15 to 24 · Surface Water · 2025 report, page 4 | 20.5 ppm | None set | None | No health limit |
| Conductivityaverage · range 1,310 to 1,440 · sampled 2024 · Groundwater, highest of 2 sources · 2025 report, page 4 | 1,380 µS/cm | None set | None | No health limit |
| Hardnessaverage · range 25 to 25.3 · sampled 2024 · Groundwater · 2025 report, page 4 | 25.2 gpg (430 ppm) | — | — | Very hard |
| Magnesiumaverage · range 50 to 55 · Groundwater, highest of 2 sources · 2025 report, page 4 | 52.5 ppm | None set | None | No health limit |
| Sodiumaverage · range 110 to 115 · Groundwater, highest of 2 sources · 2025 report, page 4 | 115 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. 2 numbers we weren’t sure about are held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Sunnyslope County Water Dist’s water between May 2025 and Feb 2026. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA5.8 pptFound in 2 of 18 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS5.1 pptFound in 1 of 18 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- Lithium25 ppbFound in 10 of 18 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.
Salty taste / high TDS
Found: Total dissolved solids
What removes it: Reverse osmosis.
PFAS ("forever chemicals")
Found: PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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