Water Quality Report · Updated October 07, 2026
EAST VALLEY WATER DISTRICT
EAST VALLEY WATER DISTRICT delivers tap water graded D (63/100) by TapWaterSafety.org. The utility serves approximately 108,629 residents in HIGHLAND, 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; Arsenic detected. For questions, the utility can be reached at 909-633-0399.
Is HIGHLAND tap water safe to drink?
EAST VALLEY WATER DISTRICT delivers tap water that earns a grade of D (63/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including haloacetic acids (haa9) significantly above health guideline.
The utility serves 108,629 residents in HIGHLAND, drawing from surface water.
Public testing data identifies 16 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Haloacetic acids (HAA5), Total trihalomethanes (TTHMs), Arsenic, Dibromoacetic acid, Bromodichloromethane, Dibromochloromethane, Nitrate, Chromium (hexavalent), Perfluorohexane sulfonate (PFHXS), Nitrate and nitrite, Trichloroacetic acid, Uranium, Dichloroacetic acid, Bromoform, Chloroform. 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.
EPA compliance record
Official U.S. EPA records for EAST VALLEY WATER DISTRICT (system ID CA3610064) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for HIGHLAND residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for EAST VALLEY WATER DISTRICT.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 23.5 ppb, 392x 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 24.0 ppb, 160x above the EWG health guideline of 0.15 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.537 ppb.
Contact EAST VALLEY WATER DISTRICT
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 HIGHLAND
Filters matched to the specific contaminants in this water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
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 63/100 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 |
23.5 ppb | 0.06 | — | — | — | — | — | 392× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
36.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 362× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
24.0 ppb | 0.15 | 80.0 | 100 | — | — | — | 160× over |
| Arsenic Heavy metal |
0.537 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 134× over |
| Dibromoacetic acid Disinfection byproduct |
3.96 ppb | 0.03 | — | — | — | — | — | 132× over |
| Bromodichloromethane Disinfection byproduct |
6.49 ppb | 0.06 | — | — | — | — | — | 108× over |
| Dibromochloromethane Disinfection byproduct |
9.85 ppb | 0.1 | — | — | — | — | — | 99× over |
| Nitrate Inorganic |
5.34 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 38× over |
| Chromium (hexavalent) Heavy metal |
0.544 ppb | 0.02 | — | — | — | — | — | 27× over |
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.024 ppt | 0.001 | 10.0 | — | — | — | — | 24× over |
| Nitrate and nitrite Inorganic |
2.18 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 16× over |
| Trichloroacetic acid Disinfection byproduct |
1.53 ppb | 0.1 | — | — | — | — | — | 15× over |
| Uranium Radiological |
5.34 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 12× over |
| Dichloroacetic acid Disinfection byproduct |
1.93 ppb | 0.2 | — | — | — | — | — | 9.6× over |
| Bromoform Disinfection byproduct |
4.27 ppb | 0.5 | — | — | — | — | — | 8.5× over |
| Chloroform Disinfection byproduct |
3.41 ppb | 0.4 | — | — | — | — | — | 8.5× over |
| Chlorate Disinfection byproduct |
47.4 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
3.82 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
4.16 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.425 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
1.31 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Aluminum Heavy metal |
0.38 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Strontium Radiological |
0.304 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.28 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.893 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.209 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.
EAST VALLEY WATER DISTRICT service area
This water system serves 1 community in San Bernardino County, California. Click any city for its dedicated tap water quality page.
Find the right filter for HIGHLAND water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.