Is Alpine, CA tap water safe?
The short answer
1 of the 4 utilities serving Alpine has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Willowside Terrace Water Association.
Padre Dam MWD, which serves the most people here, has 1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 47 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
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 Alpine’s ZIP codes, from EPA’s estimates.
- Open report
Padre Dam MWD
California · serves 93,980 people · about 5,200 in Alpine
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 47 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Willowside Terrace Water Association
California · serves 100 people · under 100 in Alpine
1 result above the legal limit and 1 result above the health goal. The worst: Uranium at 163 ppb, above the legal limit. Hardness: very hard, typically 219 mg/L (12.8 grains per gallon).
11 health-based violations since 2016
- Open report
Alpine Oaks Estates LLC
California · serves 185 people · under 100 in Alpine
1 result above the health goal. The worst: Nitrate at 12 ppm, above the health goal. Hardness: very hard, 360 mg/L (21.1 grains per gallon).
No health-based violations since 2016
- Open report
Viejas Community System
California · serves 9,600 people · lists Alpine among the places it serves
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 21.4 ppb, above EPA’s health benchmark.
No health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Padre Dam MWD’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Brita Tahoe Pitcher with Elite Filter (OB60, OB06)
Pitcher
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 13, 2026
- IAPMO listing:NSF/ANSI 53checked Oct. 13, 2026
Certified for: Lead
Brita Everyday Pitcher with Elite Filter (OB46, OB06)
Pitcher
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 13, 2026
Certified for: Lead
PUR PLUS 11-Cup Pitcher (PPT111W)
Pitcher
- NSF listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
Certified for: Lead
Water testing near Alpine
The 3 labs California certifies closest to Alpine, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Environmental Laboratory Network, Inc.
San Diego, CA · about 24 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, radioactivity
Metropolitan Solutions
National City, CA · about 25 miles
Certified for bacteria
Analytical Environmental Lab, LLC
San Diego, CA · about 25 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, disinfection byproducts
ZIP codes in Alpine
Which ZIP codes are in Alpine: 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 Alpine
Other towns in San Diego County with a page of their own.
What to do next
- Read Padre Dam MWD’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