Is Kent, WA Tap Water Safe to Drink?
Yes, Kent tap water is safe to drink. Hardness is low at 16 PPM, and no contaminants exceed health guidelines. Most homes here don't need treatment.
Hardness Scale: Where Kent Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Kent Compares
Kent's water is 88% softer than the national average of 138 PPM - ranking in the bottom 96% for hardness nationwide. Most homes here do not need a softener. Within Washington, it ranks #21 of 26 cities (52% below the state average of 33 PPM). Among mid-size cities (100k-200k), Kent ranks #179 of 189 for hardness.
What Kent's Water Means for Your Home
Hardness: 16 PPM - Low Concern
Kent's water is soft at just 16 PPM. That's good news for your plumbing, appliances, and skin. Scale buildup is a non-issue here, and a water softener would be a waste of money. Kent is softer than 96% of US cities. If you're thinking about water treatment in Kent, contaminant filtration is the place to invest.
Contaminants & Safety
Disinfection byproducts are the notable finding here. Kent's water has TTHMs at 7.28 ppb and HAA5 at 2.6 ppb — both within legal limits, but the EWG health guidelines are far stricter. These byproducts form when chlorine reacts with organic matter during treatment. A whole-house activated carbon filter reduces both chlorine and its byproducts. Want the full picture? Request your utility's annual Consumer Confidence Report.
What's in the Treatment Process
Chromium-6 was detected at 0.175 ppb, which is 8.8x 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) | 16 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 48 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 3.4 ppt | — | No total limit | Detected |
| ↳ PFOA | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| ↳ PFOS | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| Lead | 1 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 0.8 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.696 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Good news for Kent residents. Your water quality is generally good. Most homes in this area do not need a water softener. If you have concerns about lead (especially in buildings constructed before 1986) or chlorine taste, a point-of-use filter is the most practical and cost-effective solution.
How to Test Your Water in Kent
City-wide data is a solid starting point, but your specific tap might differ based on plumbing age, distance from the treatment plant, or seasonal changes.
Free option: Request City of Kent's annual Consumer Confidence Report for official city-level data.
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About Kent's Water Supply
Water Utility: City of Kent
Water Source: Tacoma Water (Green River), wells (Surface Water)
Population Served: 166,421
Hardness: 16 PPM (0.9 grains per gallon)
Kent's drinking water comes from surface sources — Tacoma Water (Green River), wells. 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 166,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of Kent'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 City of Kent in Kent, WA, including ZIP codes:
98030, 98031, 98032, 98035, 98042, 98064, 98089
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Kent to Other Washington Cities
Frequently Asked Questions About Kent Water
Is Kent tap water safe to drink?
Where does Kent's water come from?
Do I need a water softener in Kent?
What are disinfection byproducts in Kent's water?
Is chromium-6 in Kent's water?
Can I drink Kent tap water straight from the faucet?
How does Kent compare to the Washington average?
What water filter is best for Kent?
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.