We read 24 results from Golden State Wc - West Orange County’s 2025 water quality report. No results over a legal limit; 9 above a health goal or guideline.
Serves about 114,185 people · Water system ID CA3010022 · Read the district’s 2025 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
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 4.1 · Source water · 2025 report, page 8 | 2.4 ppb | 0.004 ppb | 10 ppb | Above the health goal600x the health goal |
| Bromateaverage · range ND to 8.4 · Distribution system · 2025 report, page 9 | 2.4 ppb | 0.1 ppb | 10 ppb | Above the health goal24x the health goal |
| Chromium-6average · range ND to 2.9 · Source water · 2025 report, page 8 | 0.8 ppb | 0.02 ppb | 10 ppb | Above the health goal40x the health goal |
| Gross alpha (radioactivity)average · range ND to 17.1 · Source water · 2025 report, page 8 | 5.17 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Gross beta (radioactivity)average · range ND to 17.1 · Source water · 2025 report, page 8 | 5.7 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Perchlorateaverage · range ND to 3.2 · Source water · 2025 report, page 8 | 1.1 ppb | 1 ppb | 6 ppb | Above the health goal1.1x the health goal |
| PFOA (a PFAS)average · range ND to 8.3 · Groundwater sources · 2025 report, page 8 | 3 ppt | 0.007 ppt | 4 ppt from 2029 | Above the health goal429x the health goal |
| PFOS (a PFAS)average · range ND to 16.4 · Groundwater sources · 2025 report, page 8 | 5.8 ppt | 1 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20291.5x the 4 ppt federal limit that takes effect in 2029Not a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| Uraniumaverage · range ND to 32.6 · printed as 6.71 pCi/L · Source water · 2025 report, page 8 | 10 ppb | 0.6 ppb | 30 ppb | Above the health goal17x the health goal |
| Chlorideaverage · range 12 to 99 · Source water · 2025 report, page 8 | 44.9 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.1 to 3.8 · Distribution system · 2025 report, page 9 | 1.4 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 51 homes tested, 0 over the action level · Customer taps · 2025 report, page 9 | 0.25 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)average · range ND to 7.2 · Distribution system · 2025 report, page 9 | 6 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range 1.6 to 35 · Distribution system · 2025 report, page 9 | 30 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.4 to 0.8 · Source water · 2025 report, page 8 | 0.5 ppm | 1 ppm | 2 ppm | Below the health goal |
| Lead90th percentile of 51 homes tested, 0 over the action level · Customer taps · 2025 report, page 9 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)average · range ND to 4.5 · Source water · 2025 report, page 8 | 1.5 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)average · range ND to 10.3 · Groundwater sources · 2025 report, page 8 | 4 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| Sulfateaverage · range 34.4 to 218 · Source water · 2025 report, page 8 | 92.7 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidsaverage · range 204 to 625 · Source water · 2025 report, page 8 | 412 ppm | — | 500 ppm guideline | Within the guideline |
| Turbidity (cloudiness)highest measured · Treated surface water · 2025 report, page 8 | 0.05 NTU | None set | 1 NTU | Below the legal limit |
| Conductivityaverage · range 363 to 987 · Source water · 2025 report, page 8 | 647 µS/cm | None set | None | No health limit |
| Hardnessaverage · range 3.68 to 21.6 · Source water · 2025 report, page 8 | 13.9 gpg (237 ppm) | — | — | Very hard |
| Sodiumaverage · range 34 to 97 · Source water · 2025 report, page 8 | 48 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 Golden State Wc - West Orange County’s water between Mar 2023 and Jul 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA8.1 pptFound in 5 of 24 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS16 pptFound in 9 of 24 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS9.3 pptFound in 9 of 24 samples · highest resultNo federal limit in force for this one
- Lithium34.3 ppbFound in 3 of 24 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), Uranium
What removes it: Reverse osmosis.
Industrial chemicals and pesticides
Found: Perchlorate
What removes it: Carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS), PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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