Is Woodside, CA tap water safe?
The short answer
None of the 3 utilities serving Woodside has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records.
City of Redwood City, which serves the most people here, has nothing above a health goal in EPA’s and California’s records. That data covers what its report lists, not everything.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Woodside’s ZIP codes, from EPA’s estimates.
- Open report
City of Redwood City
California · serves 90,043 people · about 3,400 in Woodside
Nothing in its records is above a health goal.
No health-based violations since 2016
- Open report
California Water Service - Bear Gulch
California · serves 60,382 people · about 1,100 in Woodside
2 results above the health goal. The worst: Lead at 4.0 ppb, above the health goal. Hardness: moderately hard to very hard depending on the source, 65 to 281 mg/L (3.8 to 16.4 grains per gallon).
No health-based violations since 2016
- Open report
California Water Service - San Carlos
California · serves 34,801 people · under 100 in Woodside
1 result above the health goal. The worst: Lead at 5.8 ppb, above the health goal.
No health-based violations since 2016
Water testing near Woodside
The 3 labs California certifies closest to Woodside, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
San Mateo County Public Health Laboratory
San Mateo, CA · about 8 miles
Certified for bacteria
Eurofins Built Environment Testing West-Burlingame
Burlingame, CA · about 13 miles
Certified for bacteria
Garratt-Callahan Laboratory
Burlingame, CA · about 13 miles
Certified for nitrate, metals, minerals and other inorganics
ZIP codes in Woodside
Which ZIP codes are in Woodside: 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 Woodside
Other towns in San Mateo County with a page of their own.
What to do next
- Read City of Redwood City’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Decide if you want a filter at allA filter for taste or chlorine is a preference, not a need. The standards say what each kind can do.NSF/ANSI standards, decoded
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water