Is Granite Bay, CA tap water safe?
The short answer
None of the 6 utilities serving Granite Bay has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records.
San Juan Water District, 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 San Juan Water District is soft, typically 17 mg/L (1 grain 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 Granite Bay’s ZIP codes, from EPA’s estimates.
- Open report
San Juan Water District
California · serves 29,738 people · about 16,900 in Granite Bay
Nothing in its records is above a health goal. Hardness: soft, typically 17 mg/L (1 grain per gallon).
No health-based violations since 2016
- Open report
Placer CWA - Foothill
California · serves 93,417 people · about 5,200 in Granite Bay
1 result above the health goal. The worst: Arsenic at 1.3 ppb, above the health goal. Hardness: soft to moderately hard depending on the source, 13 to 93 mg/L (0.8 to 5.4 grains per gallon).
No health-based violations since 2016
- Open report
City of Roseville
California · serves 165,736 people · about 960 in Granite Bay
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 62.6 ppb, above EPA’s health benchmark. Hardness: soft to very hard depending on the source, 18 to 250 mg/L (1 to 14.6 grains per gallon).
No health-based violations since 2016
- Open report
Lakeview Hills Community Assoc
California · serves 499 people · about 350 in Granite Bay
1 result above the health goal. The worst: Lead at 0.81 ppb, above the health goal.
No health-based violations since 2016
- Open report
Hidden Valley Community Association
California · serves 499 people · about 150 in Granite Bay
Nothing in its records is above a health goal.
No health-based violations since 2016
- Open report
Folsom Lake Mutual Water Co
California · serves 333 people · under 100 in Granite Bay
Nothing in its records is above a health goal.
No health-based violations since 2016
Water testing near Granite Bay
The 3 labs California certifies closest to Granite Bay, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Onterris Laboratories, LLC
El Dorado Hills, CA · about 11 miles
Certified for organic chemicals, PFAS
Ceres Analytical Laboratory, Inc.
El Dorado Hills, CA · about 11 miles
Certified for organic chemicals
BSK Associates - Sacramento Analytical Laboratory
Sacramento, CA · about 14 miles
Certified for bacteria, nitrate, minerals and other inorganics
Which ZIP codes are in Granite Bay: 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 Granite Bay
Other towns in Placer County with a page of their own.
What to do next
- Read San Juan Water District’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