Is Lompico, CA tap water safe?
The short answer
3 of the 4 utilities serving Lompico have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: San Lorenzo Valley Water Dist, Slvwd - Felton Water System and MT. Hermon Association, Inc..
San Lorenzo Valley Water Dist, which serves the most people here, has 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 32 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
The water from San Lorenzo Valley Water Dist is soft to very hard depending on the source, 46 to 470 mg/L (2.7 to 27.5 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 Lompico’s ZIP codes, from EPA’s estimates.
- Open report
San Lorenzo Valley Water Dist
California · serves 21,513 people · about 880 in Lompico
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 32 ppb, above EPA’s health benchmark. Hardness: soft to very hard depending on the source, 46 to 470 mg/L (2.7 to 27.5 grains per gallon).
1 health-based violation since 2016
- Open report
Slvwd - Felton Water System
California · serves 4,491 people · about 360 in Lompico
3 results above the health goal. The worst: Lead at 0.95 ppb, above the health goal. Hardness: moderately hard to very hard depending on the source, 105 to 270 mg/L (6.1 to 15.8 grains per gallon).
1 health-based violation since 2016
- Open report
Forest Lakes MWC
California · serves 1,067 people · about 150 in Lompico
3 results above the health goal. The worst: Arsenic at 6.6 ppb, above the health goal. Hardness: soft to very hard depending on the source, 11 to 478 mg/L (0.6 to 27.9 grains per gallon).
No health-based violations since 2016
- Open report
MT. Hermon Association, Inc.
California · serves 1,176 people · under 100 in Lompico
1 result above the health goal. The worst: Arsenic at 1.6 ppb, above the health goal. Hardness: soft, typically 25 mg/L (1.5 grains per gallon).
1 health-based violation since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in San Lorenzo Valley Water Dist’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic, Lead
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Water testing near Lompico
The 3 labs California certifies closest to Lompico, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Santa Cruz County - Health Services Agency - Environmental Health
Santa Cruz, CA · about 6 miles
Certified for bacteria
Bracewell Engineering, Inc.
Morgan Hill, CA · about 23 miles
Certified for bacteria, nitrate, minerals and other inorganics
Torrent Laboratory, Inc
Milpitas, CA · about 25 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS
ZIP codes in Lompico
Which ZIP codes are in Lompico: 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 Lompico
Other towns in Santa Cruz County with a page of their own.
What to do next
- Read San Lorenzo Valley Water Dist’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