Is Burien, WA Tap Water Safe to Drink?
Yes, Burien tap water is safe to drink. Hardness is low at 18 PPM, and no contaminants exceed health guidelines. Most homes here don't need treatment.
Hardness Scale: Where Burien Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Burien Compares
Burien's water is 87% softer than the national average of 138 PPM - ranking in the bottom 94% for hardness nationwide. Most homes here do not need a softener. Within Washington, it ranks #19 of 26 cities (45% below the state average of 33 PPM). Among smaller cities, Burien ranks #264 of 288 for hardness.
What Burien's Water Means for Your Home
Hardness: 18 PPM - Low Concern
Burien's water is slightly hard at 18 PPM. Most households won't notice any issues at this level. Scale buildup is minimal, and a water softener would be overkill. Burien is softer than 94% of US cities. If you're thinking about water treatment, contaminant filtration is where to focus your money, not softening.
Contaminants & Safety
Lead levels deserve attention. At 6 ppb, Burien is above the ideal of zero, though below the EPA action level of 15 ppb (dropping to 10 ppb in November 2027 under the Lead and Copper Rule Improvements). The lead typically comes from aging service lines or interior plumbing, not the treatment plant. A point-of-use filter certified for lead at the kitchen faucet is a practical safeguard, especially in older homes.
What's in the Treatment Process
Burien's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 31.7 ppb (40% of the legal limit, but 211x the EWG guideline) and HAA5 at 28 ppb (47% of the legal limit, but 280x the EWG guideline). These are within legal limits, but the EWG sets much tighter thresholds based on cancer-risk research. A whole-house activated carbon filter reduces both chlorine and byproducts.
Chromium-6 was detected at 0.151 ppb, which is 7.6x the EWG health guideline. There's no separate federal limit for chromium-6, only total chromium. A reverse osmosis system is the most effective removal method. All measurements are within federal legal limits. The EWG guidelines represent a more conservative, health-based standard.
| Contaminant | Detected | Health Guideline | Legal Limit | Status |
|---|---|---|---|---|
| Hardness (as CaCO₃) | 18 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 23 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 0 ppt | — | No total limit | ✓ ND |
| ↳ PFOA | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| ↳ PFOS | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| Lead | 6 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ⚠ Elevated |
| Chlorine / Chloramine | 1 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.062 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Quick Fix for Chlorine: Shower Filter
At 1 mg/L chlorine, many Burien residents notice dry skin, brittle hair, and that "pool smell" in the shower. A shower filter installs in 5 minutes, no tools needed.
How to Test Your Water in Burien
Lead enters water from your home's plumbing, not the treatment plant — so Burien's city-wide average of 6 ppb may not match your tap. Testing your specific faucet is the only way to know. Run cold water for 30 seconds before collecting a sample.
Free option: Request Seattle Public Utilities's annual Consumer Confidence Report for official city-level data.
📊 Already Tested Your Water?
City averages miss neighborhood-level variation. Share your results to help your neighbors get better data.
We review every submission before publishing. Your ZIP is shown; your identity is not.
About Burien's Water Supply
Water Utility: Seattle Public Utilities
Water Source: Cedar River via SPU (Surface Water)
Population Served: 16,065
Hardness: 18 PPM (1.1 grains per gallon)
Burien's drinking water comes from surface sources — Cedar River via SPU. Surface water requires more extensive treatment than groundwater, including coagulation, filtration, and disinfection. This heavier chlorination is why disinfection byproducts tend to be higher in surface-supplied systems. On the upside, surface sources often deliver softer water than deep aquifers. The system serves 16,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request Seattle Public Utilities's Consumer Confidence Report (CCR) or test your own tap.
ZIP Codes Covered by This Report
This water quality data applies to all areas served by Seattle Public Utilities in Burien, WA, including ZIP codes:
98013, 98062, 98070, 98322, 98359, 98366, 98367, 98378, 98384, 98386
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Burien to Other Washington Cities
Frequently Asked Questions About Burien Water
Is Burien tap water safe to drink?
Where does Burien's water come from?
Do I need a water softener in Burien?
What water filter is best for Burien?
Is Burien water safe for babies and infants?
What are disinfection byproducts in Burien's water?
Is chromium-6 in Burien's water?
Why does Burien water taste like chlorine?
Data sources: Lead and copper data from EPA Safe Drinking Water Act LCR reporting. Contaminant data from utility-reported testing results. PFAS data from EPA UCMR5 (2023–2025). Hardness from USGS and municipal reports. Data reflects system-level testing results and may not match your specific tap due to neighborhood plumbing, season, or recent utility changes. For your utility's latest results, request their Consumer Confidence Report (CCR). Our methodology. Last updated: 2026-02-24.
What Burien Homeowners Actually Buy
Common purchases for homes with 18 PPM water.
Affiliate disclosure: we may earn a commission. Selection based on Burien's water data.