Tap Water Quality Report
Tap water quality in LAKE ELSINORE, California
Tap water in LAKE ELSINORE, California receives a grade of F (47/100) from TapWaterSafety.org. It's served by ELSINORE VALLEY MWD. The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Arsenic significantly above health guideline; Radon significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in LAKE ELSINORE's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving LAKE ELSINORE.
PFAS contamination
Severe concernPerfluorononanoic acid (PFNA), Perfluorooctane sulfonate (PFOS) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 1.68 ppt, 1678x above the EWG health guideline of 0.001 ppt.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 2.42 ppb, 605x above the EWG health guideline of 0.004 ppb.
Radon significantly above health guideline
Moderate concernRadon detected at 724.61 pCi/L, 483x above the EWG health guideline of 1.5 pCi/L.
Recommended filters for LAKE ELSINORE
Filters matched to the specific contaminants in LAKE ELSINORE's water supply.
Reverse Osmosis or NSF P473 certified carbon
$80-$750Activated carbon and RO are the only technologies proven to remove PFAS at certified levels.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in LAKE ELSINORE's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Perfluorooctanoic acid (PFOA) PFAS |
4.43 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | EPA violation |
| Perfluorohexane sulfonate (PFHXS) PFAS |
1.68 ppt | 0.001 | 10.0 | — | — | — | — | 1678× over |
| Arsenic Heavy metal |
2.42 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 605× over |
| Radon Radiological |
724.61 pCi/L | 1.5 | — | — | — | — | — | 483× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
36.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 362× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
9.14 ppb | 0.06 | — | — | — | — | — | 152× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
17.3 ppb | 0.15 | 80.0 | 100 | — | — | — | 116× over |
| Bromate Disinfection byproduct |
10.0 ppb | 0.1 | 10.0 | 10 | 10 | 0.1 | — | 100× over |
| Bromodichloromethane Disinfection byproduct |
4.61 ppb | 0.06 | — | — | — | — | — | 77× over |
| Dibromochloromethane Disinfection byproduct |
4.61 ppb | 0.1 | — | — | — | — | — | 46× over |
| Dibromoacetic acid Disinfection byproduct |
1.06 ppb | 0.03 | — | — | — | — | — | 35× over |
| Perfluorononanoic acid (PFNA) PFAS |
0.103 ppt | 0.006 | 10.0 | — | — | — | — | 17× over |
| Trichloroacetic acid Disinfection byproduct |
1.56 ppb | 0.1 | — | — | — | — | — | 16× over |
| Dichloroacetic acid Disinfection byproduct |
2.53 ppb | 0.2 | — | — | — | — | — | 13× over |
| Nitrate Inorganic |
1.7 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 12× over |
| Chloroform Disinfection byproduct |
4.59 ppb | 0.4 | — | — | — | — | — | 11× over |
| Chromium (hexavalent) Heavy metal |
0.171 ppb | 0.02 | — | — | — | — | — | 8.6× over |
| Perfluorodecanoic acid (PFDA) PFAS |
0.051 ppt | 0.006 | — | — | — | — | — | 8.5× over |
| Bromoform Disinfection byproduct |
3.35 ppb | 0.5 | — | — | — | — | — | 6.7× over |
| Uranium Radiological |
2.83 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 6.6× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
1.56 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 5.2× over |
| Chlorate Disinfection byproduct |
304.4 ppb | 210.0 | — | — | — | — | — | 1.4× over |
| Vanadium Other |
19.8 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Radium, combined (-226 and -228) Radiological |
0.04 pCi/L | 0.05 | 5.0 | — | — | — | — | Below guideline |
| Molybdenum Other |
10.4 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Bromochloromethane Other |
0.0126 ppb | 0.06 | — | — | — | — | — | Below guideline |
| 1,2,3-Trichloropropane Other |
8.5e-05 ppb | 0.0007 | — | — | — | — | — | Below guideline |
| Selenium Heavy metal |
2.54 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Manganese Heavy metal |
4.02 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Barium Heavy metal |
22.8 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Aluminum Heavy metal |
12.4 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
3.56 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.0605 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
1.85 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
1.52 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
2.72 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
1.14 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.436 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Bromide Other |
300.0 ppb | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.492 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
5.37 ppb | — | — | — | — | — | — | Below guideline |
| Testosterone Other |
0.024 ppt | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from ELSINORE VALLEY MWD.