Tap Water Quality Report
Tap water quality in Marysville, Washington
Tap water in Marysville, Washington receives a grade of D (66/100) from TapWaterSafety.org. It's served by MARYSVILLE UTILITIES. The most significant water quality concerns are: Arsenic significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in Marysville's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving Marysville.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 2.3 ppb, 575x above the EWG health guideline of 0.004 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 25.5 ppb, 424x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 25.3 ppb, 253x above the EWG health guideline of 0.1 ppb.
EPA compliance record
Official U.S. EPA records for MARYSVILLE UTILITIES (system ID WA5351900) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Consumer Confidence Rule | Other (e.g. public notice) | 07/01/2025 | Resolved |
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 Marysville
Filters matched to the specific contaminants in Marysville's water supply.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
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 Marysville'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 |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
2.3 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 575× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
25.5 ppb | 0.06 | — | — | — | — | — | 424× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
25.3 ppb | 0.1 | 60.0 | 60 | — | — | — | 253× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
28.2 ppb | 0.15 | 80.0 | 100 | — | — | — | 188× over |
| Trichloroacetic acid Disinfection byproduct |
14.3 ppb | 0.1 | — | — | — | — | — | 143× over |
| Chloroform Disinfection byproduct |
24.8 ppb | 0.4 | — | — | — | — | — | 62× over |
| Dichloroacetic acid Disinfection byproduct |
10.0 ppb | 0.2 | — | — | — | — | — | 50× over |
| Bromodichloromethane Disinfection byproduct |
2.57 ppb | 0.06 | — | — | — | — | — | 43× over |
| Chromium (hexavalent) Heavy metal |
0.614 ppb | 0.02 | — | — | — | — | — | 31× over |
| Bromochloroacetic acid Disinfection byproduct |
0.352 ppb | 0.02 | — | — | — | — | — | 18× over |
| Dibromochloromethane Disinfection byproduct |
0.526 ppb | 0.1 | — | — | — | — | — | 5.3× over |
| Nitrate Inorganic |
0.613 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 4.4× over |
| Manganese Heavy metal |
79.0 ppb | 100.0 | — | 50 | 80 | — | — | Fails EU |
| Chlorate Disinfection byproduct |
115.1 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.912 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.915 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.0458 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
0.0357 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0456 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| 4-Androstene-3,17-dione* Other |
0.095 ppt | — | — | — | — | — | — | Below guideline |
| Fluoride* Inorganic |
0.68 ppm | — | 4.0 | 1.5 | 1.5 | — | — | 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 MARYSVILLE UTILITIES.