Bothell Tap Water Quality Report
Bothell's water has 1 contaminant above EPA MCLGs. Consider using a certified water filter for additional protection.
No single water system serves most of Bothell (51,770 residents, Census 2024 estimate). Its large systems are BOTHELL WATER CITY OF (EPA counts 30,060 people served, about 58% of Bothell's population); ALDERWOOD WATER DISTRICT (EPA counts 197,993 people served, more than Bothell's population); NORTHSHORE UTILITY DISTRICT (EPA counts 103,052 people served, more than Bothell's population); WOODINVILLE WATER DISTRICT (EPA counts 59,873 people served, more than Bothell's population). EPA's counts may include people served outside Bothell, so each share is at most that. Check which one bills you: each system's figures are shown separately below.
- BOTHELL WATER CITY OF: 38 contaminants tested, 1 above EPA MCLGs; health-based violations since 2020: 0
- ALDERWOOD WATER DISTRICT: 66 contaminants tested, 1 above EPA MCLGs; health-based violations since 2020: 0
- NORTHSHORE UTILITY DISTRICT: 37 contaminants tested, 1 above EPA MCLGs; health-based violations since 2020: 0
- WOODINVILLE WATER DISTRICT: 38 contaminants tested, 1 above EPA MCLGs; health-based violations since 2020: 0
Other systems listed for Bothell with results above guidelines: NORTHSHORE UTILITY DISTRICT (1 above guidelines), WOODINVILLE WATER DISTRICT (1 above guidelines), ALDERWOOD WATER DISTRICT (1 above guidelines)
Water systems
4 large systems
Residents (Census 2024)
51,770
Health-based violations since 2020
0
BOTHELL WATER CITY OF. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Oct 2024 · BOTHELL WATER CITY OF
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Bothell Tap Water Safe to Drink?
We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems. Bothell's water has 1 contaminant above EPA health-based guidelines (MCLGs), while it meets federal legal limits.
BOTHELL WATER CITY OF, Bothell's water system, serves 30,060 people. 3 other systems are listed for Bothell. Each system's results are listed under its own name, never added to BOTHELL WATER CITY OF's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for BOTHELL WATER CITY OF is from Oct 2024.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in Washington
Bothell Water Service Areas
What these numbers actually mean for Bothell, WA
We read Bothell, WA’s published record and send you a short report — which findings warrant a decision, which to ignore, and what to do about it. Including when the answer is nothing.
- 1 contaminant above EPA MCLGs and 1 contaminant with an EPA health goal detected in some samples (no level on file)
- 37 results on file
- 23 PFAS compounds on record
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Recommended Water Filters for Bothell
Based on Bothell's water quality data, these NSF-certified filters are recommended to remove contaminants above EPA MCLGs.
Culligan
ZeroWater
NSF Certified:
Flow Rate
1.9 gpm
Daily Production
1 gpd
Highlights:
- Compact design
- Easy to set up
- Affordable
- NSF-42, NSF-53, NSF-401 certified
Removes 19 contaminants:
+14 more
Strontium, Molybdenum, Fluoride, Uranium, Lead, Total PFAS, Chlorine, 25, Phosphorus, Bicarbonate, Calcium, Carbonate, Magnesium, Sodium
Santevia
Bath Filter
NSF Certified:
Flow Rate
0.36 gpm
Highlights:
- Organic cotton design reduces plastic used in construction
- Affordable upfront & ongoing cost
- The only bath filter that removed 100% chlorine with “normal” faster faucet flow
Removes 1 contaminants:
Waterdrop
A1
NSF Certified:
Flow Rate
1 gpm
Highlights:
- Performance certified
- Lower price than Philips
- Hot water dispensing
- Compact design
Removes 5 contaminants:
Whirlpool Corporation
W11256135
NSF Certified:
Capacity
1001 gal
Filter Life
3 mo
Flow Rate
0.7 gpm
Removes 19 contaminants:
+14 more
Benzene, Carbofuran, Chlorine (Free), Chlorine (Total), Chlorine Dioxide, Chlorobenzene, Cryptosporidium, Ethylbenzene, Lead, Mercury, Metolachlor, Tetrachloroethylene, Toxaphene, Turbidity
Test Your Water Quality
Professional laboratory testing provides accurate, detailed analysis of your drinking water.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
What Bothell's water readings can explain
We publish a city-level hardness figure for Bothell, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near Bothell? Public-water results do not apply to private wells. See Snohomish County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Bothell
Bothell's tap water measures 1.8 grains per gallon (30.5 mg/L) — soft on the USGS scale, below the range where scale is usually worth treating.
Water softener cost for 1.8 gpg water in Bothell — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For Washington as a whole, read water softener cost in Washington — priced against the plumber wage published for the state.
Frequently Asked Questions About Bothell Tap Water
Bothell's water has 1 contaminant above EPA MCLGs. While the water meets federal legal limits, we recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach BOTHELL WATER CITY OF. For a problem with your water now (discolored water, no water, low pressure, a leak), contact BOTHELL WATER CITY OF directly.
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