Is Elfin Forest, CA tap water safe?
The short answer
1 of the 4 utilities serving Elfin Forest has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Del Dios Mutual Water Company.
Rincon del Diablo MWD (ID - 1), which serves the most people here, has 1 result above EPA’s health benchmark. The worst: Lithium at 43 ppb, above EPA’s health benchmark. A health benchmark is a level EPA screens with, not a legal limit.
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 Elfin Forest’s ZIP codes, from EPA’s estimates.
- Open report
Rincon del Diablo MWD (ID - 1)
California · serves 28,427 people · about 1,200 in Elfin Forest
1 result above EPA’s health benchmark. The worst: Lithium at 43 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
City of Escondido
California · serves 137,044 people · about 610 in Elfin Forest
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 30 ppb, above EPA’s health benchmark. Hardness: hard to very hard depending on the source, 150 to 255 mg/L (8.8 to 14.9 grains per gallon).
No health-based violations since 2016
- Open report
Olivenhain MWD
California · serves 86,458 people · under 100 in Elfin Forest
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 54.1 ppb, above EPA’s health benchmark. Hardness: very hard, typically 227 mg/L (13.3 grains per gallon).
No health-based violations since 2016
- Open report
Del Dios Mutual Water Company
California · serves 330 people · under 100 in Elfin Forest
2 results above the health goal. The worst: Uranium at 14.6 ppb, above the health goal. Hardness: very hard, typically 507 mg/L (29.7 grains per gallon).
1 health-based violation since 2016
Water testing near Elfin Forest
The 3 labs California certifies closest to Elfin Forest, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Applied Industrial Microbiology, Inc.
Vista, CA · about 8 miles
Certified for bacteria, nitrate
Alpha Analytical Laboratories, Inc. - San Diego
Vista, CA · about 8 miles
Certified for bacteria, nitrate, minerals and other inorganics
EMSL Analytical, Inc.
San Diego, CA · about 17 miles
Certified for bacteria
ZIP codes in Elfin Forest
Which ZIP codes are in Elfin Forest: 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 Elfin Forest
Other towns in San Diego County with a page of their own.
What to do next
- Read Rincon del Diablo MWD (ID - 1)’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