Tap Water Quality Report
Tap water quality in WOODLAND, California
Tap water in WOODLAND, California receives a grade of C (79/100) from TapWaterSafety.org. It's served by CITY OF WOODLAND. 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. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in WOODLAND's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving 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.
EPA compliance record
Official U.S. EPA records for CITY OF WOODLAND (system ID CA5710006) 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.
Recommended filters for WOODLAND
Filters matched to the specific contaminants in WOODLAND's 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.
All contaminants detected in WOODLAND'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 |
|---|---|---|---|---|---|---|---|---|
| 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, 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 CITY OF WOODLAND.