We read 7 results from Grassland Colony’s 2024 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 130 people · Water system ID SD4602028 · Read the district’s 2024 report (opens in a new tab)
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Results from the 2024 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 |
|---|---|---|---|---|
| Arsenichighest measured · range 2 to 2 · sampled 2022 · 2024 report, page 4 | 2 ppb | 0.004 ppb | 10 ppb | Above the health goal500x the health goal |
| Fluoridehighest measured · range 2.7 to 2.7 · sampled 2022 · 2024 report, page 4 | 2.7 ppm | 1 ppm | 4 ppm | Above the 2 ppm secondary standard1.4x the 2 ppm secondary standard (EPA's level to prevent tooth discoloration, also used as health guidance); below the 4 ppm legal limit |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2022 · Customer taps · 2024 report, page 4 | 1 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal5x the health goal |
| Bariumhighest measured · range 0.03 to 0.03 · sampled 2022 · 2024 report, page 4 | 0.03 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chromium (total)highest measured · range 2.4 to 2.4 · sampled 2022 · 2024 report, page 4 | 2.4 ppb | None set | 100 ppb | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2022 · Customer taps · 2024 report, page 4 | 0.1 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Seleniumhighest measured · range 0.5 to 0.5 · sampled 2022 · 2024 report, page 4 | 0.5 ppb | 30 ppb | 50 ppb | Below the health goal |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.
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.
Fluoride
Found: Fluoride
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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