Tap Water Quality Report
Tap water quality in Lynnwood, Washington
Tap water in Lynnwood, Washington receives a grade of D (66/100) from TapWaterSafety.org. It's served by 2 public water systems, primarily ALDERWOOD WATER DISTRICT. 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. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in Lynnwood's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utilities serving Lynnwood.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 34.1 ppb, 568x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 32.9 ppb, 329x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 36.6 ppb, 244x above the EWG health guideline of 0.15 ppb.
Water systems serving Lynnwood
Lynnwood is served by 2 public water systems. Click any utility to see its complete grade card and treatment plant contact info.
ALDERWOOD WATER DISTRICT
- Haloacetic acids (HAA9) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
LYNNWOOD CITY OF
- Haloacetic acids (HAA9) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
Recommended filters for Lynnwood
Filters matched to the specific contaminants in Lynnwood's 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.
All contaminants detected in Lynnwood'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 |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
40.6 ppb | 0.06 | — | — | — | — | — | 677× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
34.7 ppb | 0.1 | 60.0 | 60 | — | — | — | 347× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
36.6 ppb | 0.15 | 80.0 | 100 | — | — | — | 244× over |
| Trichloroacetic acid Disinfection byproduct |
21.6 ppb | 0.1 | — | — | — | — | — | 216× over |
| Chloroform Disinfection byproduct |
35.0 ppb | 0.4 | — | — | — | — | — | 87× over |
| Dichloroacetic acid Disinfection byproduct |
12.0 ppb | 0.2 | — | — | — | — | — | 60× over |
| Bromodichloromethane Disinfection byproduct |
1.63 ppb | 0.06 | — | — | — | — | — | 27× over |
| Chromium (hexavalent) Heavy metal |
0.294 ppb | 0.02 | — | — | — | — | — | 15× over |
| Chlorate Disinfection byproduct |
102.3 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
7.08 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
1.16 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.075 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Vanadium* Other |
0.075 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.0125 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0178 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 ALDERWOOD WATER DISTRICT.