We read 25 results from Liberty Utilities - Lynwood’s 2025 water quality report. No results over a legal limit; 5 above a health goal or guideline.
Serves about 24,701 people · Water system ID CA1910161 · 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 |
|---|---|---|---|---|
| Lead90th percentile of 31 homes tested, 0 over the action level · Customer taps · 2025 report, page 7 | 0.85 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal4.3x the health goal |
| PFOA (a PFAS)average · range ND to 4.3 · Liberty Utilities wells · 2025 report, page 10 | 4.1 ppt | 0.007 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20291x 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 ND to 16 · Liberty Utilities wells · 2025 report, page 10 | 15 ppt | 1 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20293.8x 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 465 to 625 · Metropolitan (MWD) water, highest of 2 sources · 2025 report, page 9 | 545 ppm | — | 500 ppm guideline | Above the guideline1.1x the guideline (taste, odor or stains; not a health limit) |
| Uraniumaverage · range ND to 4.47 · printed as 1 pCi/L · Metropolitan (MWD) water · 2025 report, page 8 | 1.49 ppb | 0.6 ppb | 30 ppb | Above the health goal2.5x the health goal |
| Aluminumaverage · range ND to 0.08 · Metropolitan (MWD) water · 2025 report, page 8 | 0.06 ppm | — | 0.2 ppm guideline | Within the guideline |
| Chlorideaverage · range 84 to 99 · Metropolitan (MWD) water, highest of 2 sources · 2025 report, page 9 | 92 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 1.11 to 1.17 · Distribution system · 2025 report, page 7 | 1.13 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 31 homes tested, 0 over the action level · Customer taps · 2025 report, page 7 | 0.25 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)average · range ND to 2.5 · Distribution system · 2025 report, page 7 | 1.8 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range ND to 12 · Distribution system · 2025 report, page 7 | 10.8 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.63 to 0.87 · Distribution system, highest of 3 sources · 2025 report, page 7 | 0.8 ppm | 1 ppm | 2 ppm | Below the health goal |
| PFHxS (a PFAS)average · range ND to 4 · Liberty Utilities wells · 2025 report, page 10 | 3.8 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| Sulfateaverage · range 146 to 218 · Metropolitan (MWD) water, highest of 2 sources · 2025 report, page 9 | 182 ppm | — | 250 ppm guideline | Within the guideline |
| Turbidity (cloudiness)highest measured · Metropolitan (MWD) water · 2025 report, page 8 | 0.05 NTU | None set | 1 NTU | Below the legal limit |
| 1,4-Dioxaneaverage · range ND to 2 · Liberty Utilities wells · 2025 report, page 10 | 2 ppb | None set | None | No health limit |
| Alkalinityaverage · Liberty Utilities wells, highest of 2 sources · 2025 report, page 9 | 170 ppm | None set | None | No health limit |
| Boronaverage · printed as 130 ppb · Metropolitan (MWD) water · 2025 report, page 10 | 0.13 ppm | None set | None | No health limit |
| Calciumaverage · Liberty Utilities wells, highest of 2 sources · 2025 report, page 9 | 62 ppm | None set | None | No health limit |
| Chlorateaverage · Metropolitan (MWD) water · 2025 report, page 10 | 32 ppb | None set | None | No health limit |
| Conductivityaverage · range 759 to 987 · Metropolitan (MWD) water, highest of 2 sources · 2025 report, page 9 | 873 µS/cm | None set | None | No health limit |
| Hardnessaverage · range 11.2 to 16.4 · Metropolitan (MWD) water, highest of 2 sources · 2025 report, page 9 | 13.8 gpg (236 ppm) | — | — | Very hard |
| Lithiumaverage · range 28 to 42 · Metropolitan (MWD) water · 2025 report, page 10 | 35 ppb | None set | None | No health limit |
| Magnesiumaverage · range 19 to 25 · Metropolitan (MWD) water, highest of 2 sources · 2025 report, page 9 | 22 ppm | None set | None | No health limit |
| Sodiumaverage · range 78 to 97 · Metropolitan (MWD) water, highest of 2 sources · 2025 report, page 9 | 88 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 Liberty Utilities - Lynwood’s water between Feb 2024 and Nov 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA5 pptFound in 2 of 8 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS17 pptFound in 2 of 8 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS4.8 pptFound in 2 of 8 samples · highest resultNo federal limit in force for this one
- Lithium88.6 ppbFound in 4 of 8 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.
Lead
Found: Lead
What removes it: Certified 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.
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