We read 35 results from Orchard Dale Water District’s 2025 water quality report. No results over a legal limit; 8 above a health goal or guideline.
Serves about 25,000 people · Water system ID CA1910101 · 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 2.4 to 3.8 · Groundwater · 2025 report, page 3 | 3.2 ppb | 0.004 ppb | 10 ppb | Above the health goal800x the health goal |
| Chromium-6average · range 0.54 to 0.76 · Groundwater · 2025 report, page 3 | 0.6 ppb | 0.02 ppb | 10 ppb | Above the health goal30x the health goal |
| Copper90th percentile of 30 homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 3 | 0.34 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.1x the health goal |
| Gross alpha (radioactivity)average · range 1.5 to 4.5 · Groundwater · 2025 report, page 3 | 2.6 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| PFOA (a PFAS)average · range 8.2 to 12 · Groundwater · 2025 report, page 3 | 10.9 ppt | 0.007 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20292.7x 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. |
| PFOS (a PFAS)average · range 12 to 28 · Groundwater · 2025 report, page 3 | 21 ppt | 1 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20295.3x 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. |
| Total dissolved solidsaverage · range 500 to 610 · Groundwater · 2025 report, page 3 | 563 ppm | — | 500 ppm guideline | Above the guideline1.1x the guideline (taste, odor or stains; not a health limit) |
| Uraniumaverage · range 2.24 to 5.51 · printed as 2.9 pCi/l · Groundwater · 2025 report, page 3 | 4.32 ppb | 0.6 ppb | 30 ppb | Above the health goal7.2x the health goal |
| Aluminumaverage · range ND to 0.03 · Groundwater, highest of 2 sources · 2025 report, page 3 | 0.004 ppm | — | 0.2 ppm guideline | Within the guideline |
| Bariumaverage · range ND to 0.08 · Groundwater · 2025 report, page 3 | 0.03 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloramineaverage · range 0.2 to 1.28 · Distribution system · 2025 report, page 3 | 0.66 ppm | None set | 4 ppm | Below the legal limit |
| Chlorideaverage · range 91 to 110 · Groundwater · 2025 report, page 3 | 103 ppm | — | 250 ppm guideline | Within the guideline |
| Disinfection byproducts (HAA5)average · range ND to 3.1 · Distribution system · 2025 report, page 3 | 1.8 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range 6.2 to 16.7 · Distribution system · 2025 report, page 3 | 12.9 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.19 to 0.28 · Groundwater · 2025 report, page 3 | 0.2 ppm | 1 ppm | 2 ppm | Below the health goal |
| Ironaverage · range ND to 0.04 · printed as 9.75 ug/l · Groundwater · 2025 report, page 3 | 0.0097 ppm | — | 0.3 ppm guideline | Within the guideline |
| Mercuryaverage · range ND to 0.67 · Groundwater · 2025 report, page 3 | 0.1 ppb | 1.2 ppb | 2 ppb | Below the health goal |
| Nitrate (as N)average · range 3.3 to 3.6 · Groundwater · 2025 report, page 3 | 3.4 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)average · range 2.3 to 5.9 · Groundwater · 2025 report, page 3 | 4.51 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| PFNA (a PFAS)average · range ND to 2.5 · Groundwater · 2025 report, page 3 | 1.31 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| pHaverage · range 6.6 to 7.6 · Groundwater · 2025 report, page 3 | 7.2 | — | — | Normal range |
| Seleniumaverage · range ND to 1.1 · Groundwater · 2025 report, page 3 | 0.2 ppb | 30 ppb | 50 ppb | Below the health goal |
| Sulfateaverage · range 97 to 160 · Groundwater · 2025 report, page 3 | 134 ppm | — | 250 ppm guideline | Within the guideline |
| Turbidity (cloudiness)average · range ND to 0.68 · Distribution system, highest of 2 sources · 2025 report, page 3 | 0.3 NTU | None set | 1 NTU | Below the legal limit |
| 1,4-Dioxaneaverage · range 0.7 to 1.4 · Groundwater · 2025 report, page 3 | 1 ppb | None set | None | No health limit |
| Alkalinityaverage · range 180 to 200 · Groundwater · 2025 report, page 3 | 188 ppm | None set | None | No health limit |
| Calciumaverage · range 70.1 to 105 · Groundwater · 2025 report, page 3 | 88.9 ppm | None set | None | No health limit |
| Conductivityaverage · range 780 to 970 · Groundwater · 2025 report, page 3 | 923 µS/cm | None set | None | No health limit |
| Hardnessaverage · range 13.6 to 20.2 · Groundwater · 2025 report, page 3 | 17.7 gpg (302 ppm) | — | — | Very hard |
| Magnesiumaverage · range 13.7 to 19.8 · Groundwater · 2025 report, page 3 | 17.5 ppm | None set | None | No health limit |
| PFBS (a PFAS)average · range 6.4 to 9.4 · Groundwater · 2025 report, page 3 | 7.91 ppt | None set | None | No health limit |
| PFHpA (a PFAS)average · range ND to 2.6 · Groundwater · 2025 report, page 3 | 1.84 ppt | None set | None | No health limit |
| PFHxA (a PFAS)average · range 6.6 to 11 · Groundwater · 2025 report, page 3 | 8.06 ppt | None set | None | No health limit |
| Potassiumaverage · range 3.9 to 4.8 · Groundwater · 2025 report, page 3 | 4.6 ppm | None set | None | No health limit |
| Sodiumaverage · range 64 to 71 · Groundwater · 2025 report, page 3 | 67.5 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 Orchard Dale Water District’s water between Oct 2024 and Apr 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA9.9 pptFound in 2 of 2 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS23 pptFound in 2 of 2 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS4 pptFound in 2 of 2 samples · highest resultNo federal limit in force for this one
- PFBS7.2 pptFound in 2 of 2 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.
Copper
Found: Copper
What removes it: Reverse osmosis.
Radium and uranium
Found: Gross alpha (radioactivity), Uranium
What removes it: Reverse osmosis.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS), PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
Salty taste / high TDS
Found: Total dissolved solids
What removes it: Reverse osmosis.
More districts: California water quality · All states · Something look wrong? Tell us