Is Ramona, CA tap water safe?
The short answer
1 of the 2 utilities serving Ramona has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Rancho Santa Teresa Mw Co..
Ramona Municipal WD, 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 36 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 Ramona’s ZIP codes, from EPA’s estimates.
- Open report
Ramona Municipal WD
California · serves 36,455 people · about 8,100 in Ramona
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 36 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Rancho Santa Teresa Mw Co.
California · serves 102 people · under 100 in Ramona
1 result above the legal limit, 1 result above the limit’s level with no violation recorded and 1 result above the health goal. The worst: Nitrate at 13 ppm, above the legal limit. Hardness: very hard, typically 268 mg/L (15.6 grains per gallon).
20 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 Ramona Municipal WD’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 Ramona
The 3 labs California certifies closest to Ramona, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
EMSL Analytical, Inc.
San Diego, CA · about 23 miles
Certified for bacteria
Analytical Environmental Lab, LLC
San Diego, CA · about 23 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, disinfection byproducts
Applied Industrial Microbiology, Inc.
Vista, CA · about 23 miles
Certified for bacteria, nitrate
ZIP codes in Ramona
Which ZIP codes are in Ramona: 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 Ramona
Other towns in San Diego County with a page of their own.
What to do next
- Read Ramona Municipal WD’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