Is Yolo, CA tap water safe?
The short answer
1 of the 2 utilities serving Yolo has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Cacheville Service Dist.
Cacheville Service Dist, 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.
The water from Cacheville Service Dist is very hard, typically 269 mg/L (15.7 grains per gallon). How California’s water compares.
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 Yolo’s ZIP codes, from EPA’s estimates.
- Open report
Cacheville Service Dist
California · serves 239 people · nearly all in Yolo
Nothing in its records is above a health goal. Hardness: very hard, typically 269 mg/L (15.7 grains per gallon).
1 health-based violation since 2016
- Open report
City of Woodland
California · serves 61,462 people · about 270 in Yolo
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 46.1 ppb, above EPA’s health benchmark. Hardness: moderately hard to very hard depending on the source, 61 to 400 mg/L (3.6 to 23.4 grains per gallon).
No health-based violations since 2016
Water testing near Yolo
The 3 labs California certifies closest to Yolo, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Eurofins Sacramento Service Center
West Sacramento, CA · about 17 miles
Certified for bacteria, nitrate, minerals and other inorganics
Eurofins Sacramento
West Sacramento, CA · about 17 miles
Certified for minerals and other inorganics, organic chemicals, PFAS
Bend Genetics LLC
Sacramento, CA · about 25 miles
Which ZIP codes are in Yolo: 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 Yolo
Other towns in Yolo County with a page of their own.
What to do next
- Read Cacheville Service Dist’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