Is Grass Valley, CA tap water safe?
The short answer
1 of the 6 utilities serving Grass Valley has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Sierra Pines Mobile Home Park.
Nevada ID - E. George, Banner Mountain, 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 Nevada ID - E. George, Banner Mountain is soft, typically 13 mg/L (0.7 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 Grass Valley’s ZIP codes, from EPA’s estimates.
- Open report
Nevada ID - E. George, Banner Mountain
California · serves 17,154 people · about 730 in Grass Valley
Nothing in its records is above a health goal. Hardness: soft, typically 13 mg/L (0.7 grains per gallon).
No health-based violations since 2016
- Open report
City of Grass Valley
California · serves 4,947 people · about 530 in Grass Valley
2 results above the health goal. The worst: Uranium at 2.7 ppb, above the health goal. Hardness: soft, typically 12 mg/L (0.7 grains per gallon).
No health-based violations since 2016
- Open report
Nevada ID - Loma Rica
California · serves 14,072 people · about 160 in Grass Valley
1 result above the health goal. The worst: Lead at 0.77 ppb, above the health goal. Hardness: soft, 12 mg/L (0.7 grains per gallon).
No health-based violations since 2016
- Open report
Sierra Pines Mobile Home Park
California · serves 70 people · under 100 in Grass Valley
1 result above the health goal. The worst: Lead at 5.6 ppb, above the health goal. Hardness: soft, 30 mg/L (1.8 grains per gallon).
1 health-based violation since 2016
- Open report
Nevada ID - Lake of Pines
California · serves 6,870 people · under 100 in Grass Valley
Nothing in its records is above a health goal. Hardness: soft, 16 mg/L (0.9 grains per gallon).
No health-based violations since 2016
- Open report
Christian Encounter Ministries
California · serves 35 people · based in Grass Valley
Nothing in its records is above a health goal. Hardness: hard, 148 mg/L (8.7 grains per gallon).
No health-based violations since 2016
Water testing near Grass Valley
The 3 labs California certifies closest to Grass Valley, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Cranmer Engineering, Inc.
Grass Valley, CA · about 6 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics
Onterris Laboratories, LLC
El Dorado Hills, CA · about 35 miles
Certified for organic chemicals, PFAS
Ceres Analytical Laboratory, Inc.
El Dorado Hills, CA · about 35 miles
Certified for organic chemicals
Which ZIP codes are in Grass Valley: 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 Grass Valley
Other towns in Nevada County with a page of their own.
What to do next
- Read Nevada ID - E. George, Banner Mountain’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