Is Hidden Valley Lake, CA tap water safe?
The short answer
Hidden Valley Lake CSD serves Hidden Valley Lake. In EPA’s and California’s records it has 1 result above EPA’s health benchmark, and no health-based violation since 2016.
The worst: Lithium at 17.3 ppb, above EPA’s health benchmark. A health benchmark is a level EPA screens with, not a legal limit.
The water from Hidden Valley Lake CSD is very hard, typically 231 mg/L (13.5 grains per gallon). How California’s water compares.
Some homes in a town are on private wells or a small system of their own. The name on your water bill tells you which is yours.
Water testing near Hidden Valley Lake
The 3 labs California certifies closest to Hidden Valley Lake, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
K Prime, LLC.
Santa Rosa, CA · about 25 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, PFAS
Sonoma County Public Health Laboratory
Santa Rosa, CA · about 26 miles
Certified for bacteria
Brelje and Race Laboratories, Inc.
Santa Rosa, CA · about 28 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
Which ZIP codes are in Hidden Valley Lake: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: California State Water Resources Control Board, ELAP accredited laboratories and their fields of accreditation; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Hidden Valley Lake
Other towns in Lake County with a page of their own.
What to do next
- Read Hidden Valley Lake CSD’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About LithiumWhat it does to health, where it comes from, and the certification claim that addresses it.About Lithium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water