City of Greenfield Water Quality (California) – 2025 Report Results

We read 25 results from City of Greenfield’s 2025 water quality report. No results over a legal limit; 6 above a health goal or guideline.

Serves about 18,967 people · Water system ID CA2710008 · 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 1.3 to 2.3 · 2025 report, page 5	1.7 ppb	0.004 ppb	10 ppb	Above the health goal425x the health goal
Chromium-6average · range 1.2 to 2.6 · sampled 2024 · 2025 report, page 6	2.1 ppb	0.02 ppb	10 ppb	Above the health goal105x the health goal
Gross alpha (radioactivity)average · range 3.22 to 7.3 · sampled 2024 · 2025 report, page 5	5.92 pCi/L	0 pCi/L	15 pCi/L	Above the health goalThe health goal is zero
Radium-226average · range 0.2 to 0.66 · 2025 report, page 6	0.37 pCi/L	0.05 pCi/L	5 pCi/L	Above the health goal7.4x the health goal
Total dissolved solidsaverage · range 402 to 772 · 2025 report, page 7	590 ppm	—	500 ppm guideline	Above the guideline1.2x the guideline (taste, odor or stains; not a health limit)
Uraniumaverage · range 5.36 to 10.1 · printed as 5.12 pCi/L · sampled 2024 · 2025 report, page 7	7.63 ppb	0.6 ppb	30 ppb	Above the health goal13x the health goal
Antimonyaverage · range ND to 0.2 · 2025 report, page 5	0.1 ppb	1 ppb	6 ppb	Below the health goal
Bariumaverage · range 0.05 to 0.06 · 2025 report, page 5	0.05 ppm	2 ppm	2 ppm	Below the health goal
Chlorideaverage · range 32 to 92 · 2025 report, page 7	65 ppm	—	250 ppm guideline	Within the guideline
Chlorineaverage · range 0.59 to 1.82 · 2025 report, page 5	1.28 ppm	None set	4 ppm	Below the legal limit
Chromium (total)average · range 1.4 to 4.5 · 2025 report, page 5	2.83 ppb	None set	100 ppb	Below the legal limit
Copper90th percentile of 33 homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 4	0.1 ppm	0.3 ppm	1.3 ppm (action level)	Below the health goal
Disinfection byproducts (TTHM)average · range ND to 1.3 · Storage tanks · 2025 report, page 7	0.65 ppb	None set	80 ppb	Below the legal limit
Fluorideaverage · range 0.1 to 0.2 · 2025 report, page 5	0.17 ppm	1 ppm	2 ppm	Below the health goal
Lead90th percentile of 33 homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 4	Not detected	0.2 ppb	15 ppb (action level)	Not detected
Nitrate (as N)average · range 1.1 to 2.6 · Distribution · 2025 report, page 6	1.8 ppm	10 ppm	10 ppm	Below the health goal
Seleniumaverage · range 2.6 to 5.1 · 2025 report, page 6	3.67 ppb	30 ppb	50 ppb	Below the health goal
Sulfateaverage · range 110 to 252 · 2025 report, page 7	184 ppm	—	250 ppm guideline	Within the guideline
Boronaverage · range 0.12 to 0.28 · 2025 report, page 8	0.21 ppm	None set	None	No health limit
Conductivityaverage · range 677 to 1,041 · 2025 report, page 7	841 µS/cm	None set	None	No health limit
Hardnessaverage · range 13.8 to 24.9 · 2025 report, page 4	18.4 gpg (314 ppm)	—	—	Very hard
Lithiumaverage · range 21.3 to 54.3 · sampled 2024 · 2025 report, page 8	36.4 ppb	None set	None	No health limit
Nickelaverage · range 3.6 to 9.4 · 2025 report, page 6	5.57 ppb	None set	None	No health limit
Potassiumaverage · range 3.1 to 4.1 · 2025 report, page 8	3.58 ppm	None set	None	No health limit
Sodiumaverage · range 37 to 81 · 2025 report, page 4	63.5 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.

EPA testing for PFAS and lithium

EPA’s own nationwide testing (UCMR 5) found these in City of Greenfield’s water between Apr 2024 and Oct 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.

Lithium54.3 ppbFound in 4 of 4 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.