Water Quality Report · Updated May 12, 2026
CITY OF WOODLAND
CITY OF WOODLAND delivers tap water graded C (67/100) by TapWaterSafety.org. The utility serves approximately 61,462 residents in WOODLAND, California using surface water (purchased). The most significant water quality concerns are: Chromium (hexavalent) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Arsenic significantly above health guideline. For questions, the utility can be reached at 530-661-5963.
Is WOODLAND tap water safe to drink?
CITY OF WOODLAND delivers tap water that earns a grade of C (67/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 61,462 residents in WOODLAND, drawing from surface water (purchased).
Public testing data identifies 8 contaminants in this water above EWG's health-based guidelines, including: Chromium (hexavalent), Haloacetic acids (HAA9), Arsenic, Haloacetic acids (HAA5), Total trihalomethanes (TTHMs), Nitrate, Nitrate and nitrite, Bromate*. 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 WOODLAND residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for CITY OF WOODLAND.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 16.5 ppb, 823x above the EWG health guideline of 0.02 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 8.99 ppb, 150x above the EWG health guideline of 0.06 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 0.535 ppb, 134x above the EWG health guideline of 0.004 ppb.
Contact CITY OF WOODLAND
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 WOODLAND
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.
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.
Score breakdown
This utility's overall score of 67/100 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 |
|---|---|---|---|---|---|---|---|---|
| Chromium (hexavalent) Heavy metal |
16.5 ppb | 0.02 | — | — | — | — | — | 823× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
8.99 ppb | 0.06 | — | — | — | — | — | 150× over |
| Arsenic Heavy metal |
0.535 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 134× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
11.4 ppb | 0.1 | 60.0 | 60 | — | — | — | 114× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
16.6 ppb | 0.15 | 80.0 | 100 | — | — | — | 111× over |
| Nitrate Inorganic |
2.35 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 17× over |
| Nitrate and nitrite Inorganic |
1.5 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 11× over |
| Bromate* Disinfection byproduct |
0.259 ppb | 0.1 | 10.0 | 10 | 10 | 0.1 | — | 2.6× over |
| Uranium Radiological |
0.35 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | Below guideline |
| Chlorate Disinfection byproduct |
92.9 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
4.31 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Selenium Heavy metal |
0.891 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Manganese Heavy metal |
1.98 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.00572 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Aluminum Heavy metal |
8.06 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Molybdenum Other |
0.131 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.826 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.102 ppb | — | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
1.0 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Lithium Other |
12.4 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.
CITY OF WOODLAND service area
This water system serves 1 community in Yolo County, California. Click any city for its dedicated tap water quality page.
Find the right filter for WOODLAND water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.