Is Marysville, WA Tap Water Safe to Drink?
Yes, Marysville 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 Marysville Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Marysville Compares
Marysville'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 #18 of 26 cities (45% below the state average of 33 PPM). Among cities (50k-100k), Marysville ranks #246 of 258 for hardness.
What Marysville's Water Means for Your Home
Hardness: 18 PPM - Low Concern
Marysville'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. Marysville 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
Disinfection byproducts are the notable finding here. Marysville's water has TTHMs at 28.2 ppb and HAA5 at 25.3 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
Marysville's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 28.2 ppb (35% of the legal limit, but 188x the EWG guideline) and HAA5 at 25.3 ppb (42% of the legal limit, but 253x 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 0.614 ppb, which is 31x 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 | 24 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 | 2 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 1.7 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.613 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Recommendations for Marysville Homes
Quick Fix for Chlorine: Shower Filter
At 1.7 mg/L chlorine, many Marysville 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 Marysville
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 Marysville Water's annual Consumer Confidence Report for official city-level data.
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About Marysville's Water Supply
Water Utility: City of Marysville Water
Water Source: Snohomish County wells (Surface Water)
Population Served: 88,589
Hardness: 18 PPM (1.1 grains per gallon)
Marysville's drinking water comes from surface sources — Snohomish County 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 89,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of Marysville Water'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 Marysville Water in Marysville, WA, including ZIP codes:
98223, 98237, 98238, 98239, 98259, 98270, 98271, 98273, 98274, 98277, 98278, 98282, 98287, 98292
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Marysville to Other Washington Cities
Frequently Asked Questions About Marysville Water
Is Marysville tap water safe to drink?
Where does Marysville's water come from?
Do I need a water softener in Marysville?
What are disinfection byproducts in Marysville's water?
Is chromium-6 in Marysville's water?
Why does Marysville water taste like chlorine?
Can I drink Marysville tap water straight from the faucet?
How does Marysville compare to the Washington average?
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 Marysville Homeowners Actually Buy
Common purchases for homes with 18 PPM water.
Affiliate disclosure: we may earn a commission. Selection based on Marysville's water data.