Nps Ggnra water quality

Updated 2026-10-23 · California · Affiliate disclosure

We read 4 results from Nps Ggnra’s 2022 water quality report. No results over a legal limit or above a health goal.

Serves about 18,447 people · Water system ID CA2110350 · Read the district’s 2022 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 2022 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.

ContaminantResultHealth goalLegal limitWhat it means
Copper90th percentile of 10 homes tested, 0 over the action level · sampled 2021 · Customer taps · 2022 report0.07 ppm0.3 ppm1.3 ppm (action level)Below the health goal
Disinfection byproducts (HAA5)average · range ND to 11 · sampled 2024 · 2022 report5.9 ppbNone set60 ppbBelow the legal limit
Disinfection byproducts (TTHM)average · range 39 to 54 · sampled 2024 · 2022 report48 ppbNone set80 ppbBelow the legal limit
Lead90th percentile of 10 homes tested, 0 over the action level · sampled 2021 · Customer taps · 2022 reportNot detected0.2 ppb15 ppb (action level)Not detected

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 in this report is above a health goal or legal limit. If you’re bothered by taste, smell, hardness or spots, or your home has older pipes, the filter catalog and buyer questions can help you pick, and a test of your own tap shows what your plumbing adds.

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