Water Quality Report · Updated May 12, 2026
ESCONDIDO, CITY OF
ESCONDIDO, CITY OF delivers tap water graded D (64/100) by TapWaterSafety.org. The utility serves approximately 137,044 residents in ESCONDIDO, California using surface water. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. For questions, the utility can be reached at 760-839-6290.
Is ESCONDIDO tap water safe to drink?
ESCONDIDO, CITY OF delivers tap water that earns a grade of D (64/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including haloacetic acids (haa9) significantly above health guideline.
The utility serves 137,044 residents in ESCONDIDO, drawing from surface water.
Public testing data identifies 13 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Haloacetic acids (HAA5), Total trihalomethanes (TTHMs), Bromodichloromethane, Dibromochloromethane, Dibromoacetic acid, Trichloroacetic acid, Chloroform, Dichloroacetic acid, Chlorite, Bromoform, Uranium, Chlorate. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
Quick actions for ESCONDIDO residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for ESCONDIDO, CITY OF.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 31.3 ppb, 522x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 36.2 ppb, 362x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 32.3 ppb, 215x above the EWG health guideline of 0.15 ppb.
Contact ESCONDIDO, CITY OF
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for ESCONDIDO
Filters matched to the specific contaminants in this water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 64/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). 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 |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
31.3 ppb | 0.06 | — | — | — | — | — | 522× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
36.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 362× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
32.3 ppb | 0.15 | 80.0 | 100 | — | — | — | 215× over |
| Bromodichloromethane Disinfection byproduct |
10.8 ppb | 0.06 | — | — | — | — | — | 180× over |
| Dibromochloromethane Disinfection byproduct |
9.62 ppb | 0.1 | — | — | — | — | — | 96× over |
| Dibromoacetic acid Disinfection byproduct |
1.62 ppb | 0.03 | — | — | — | — | — | 54× over |
| Trichloroacetic acid Disinfection byproduct |
3.61 ppb | 0.1 | — | — | — | — | — | 36× over |
| Chloroform Disinfection byproduct |
9.39 ppb | 0.4 | — | — | — | — | — | 23× over |
| Dichloroacetic acid Disinfection byproduct |
4.3 ppb | 0.2 | — | — | — | — | — | 21× over |
| Chlorite Disinfection byproduct |
295.5 ppb | 50.0 | 1000.0 | — | — | — | — | 5.9× over |
| Bromoform Disinfection byproduct |
2.41 ppb | 0.5 | — | — | — | — | — | 4.8× over |
| Uranium Radiological |
2.06 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 4.8× over |
| Chlorate Disinfection byproduct |
349.4 ppb | 210.0 | — | — | — | — | — | 1.7× over |
| Chromium (hexavalent) Heavy metal |
0.012 ppb | 0.02 | — | — | — | — | — | Below guideline |
| Bromochloromethane Other |
0.00931 ppb | 0.06 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
3.46 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
55.2 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Manganese Heavy metal |
5.96 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.165 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.134 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.694 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.605 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
22.8 ppb | — | — | — | — | — | — | 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 (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
ESCONDIDO, CITY OF service area
This water system serves 1 community in San Diego County, California. Click any city for its dedicated tap water quality page.
Find the right filter for ESCONDIDO water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.