We read 14 results from Gsw&Sa (Sc2620004)’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 247,550 people · Water system ID SC2620004 · 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 |
|---|---|---|---|---|
| Gross alpha (radioactivity)average · range 0.4 to 0.62 · sampled 2023 · Bull Creek plant · 2025 report, page 2 | 0.5 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Gross beta (radioactivity)single sample · sampled 2019 · Bull Creek plant · 2025 report, page 2 | 3 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Atrazinesingle sample · Bull Creek plant · 2025 report, page 2 | 0.02 ppb | 0.15 ppb | 3 ppb | Below the health goal |
| Chloramineaverage · range 2.45 to 3.01 · Distribution system · 2025 report, page 2 | 2.73 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 2 | 0.13 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 1.8 to 29.9 · Distribution system · 2025 report, page 2 | 24.9 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range ND to 50.5 · Distribution system · 2025 report, page 2 | 35.2 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.19 to 1.16 · Bull Creek plant · 2025 report, page 2 | 0.59 ppm | 1 ppm | 4 ppm | Below the health goal |
| Manganeseaverage · range 0.0007 to 0.03 · printed as 4.4 ppb · Bull Creek plant · 2025 report, page 2 | 0.0044 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)average · range ND to 0.72 · Bull Creek plant · 2025 report, page 2 | 0.31 ppm | 10 ppm | 10 ppm | Below the health goal |
| Turbidity (cloudiness)highest measured · range 0.02 to 0.13 · Bull Creek plant · 2025 report, page 2 | 0.13 NTU | None set | 1 NTU | Below the legal limit |
| Bromideaverage · range 22.6 to 36.6 · Bull Creek plant · 2025 report, page 2 | 29.6 ppb | None set | None | No health limit |
| Haloacetic acids (HAA9)highest running annual average · range 25.6 to 57.2 · Distribution system · 2025 report, page 2 | 43.2 ppb | None set | None | No health limit |
| Sodiumsingle sample · Bull Creek plant · 2025 report, page 2 | 17 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 Gsw&Sa (Sc2620004)’s water between Jul 2023 and May 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA11.4 pptFound in 9 of 20 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS11.5 pptFound in 9 of 20 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFBS5.6 pptFound in 7 of 20 samples · highest resultNo federal limit in force for this one
- Lithium30.1 ppbFound in 9 of 23 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), Gross beta (radioactivity)
What removes it: Reverse osmosis.
PFAS ("forever chemicals")
Found: PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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