Is Overland Park, KS Tap Water Safe to Drink?
Yes, Overland Park tap water is safe to drink. No contaminants exceed health guidelines. However, Overland Park has very hard water at 241 PPM, which will cause scale buildup in plumbing and appliances over time. A water softener is worth considering.
Hardness Scale: Where Overland Park Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Overland Park Compares
Overland Park's water is 75% harder than the national average of 138 PPM. It ranks #205 out of 1000 cities in our database (harder than 80% of US cities we track). Within Kansas, it ranks #9 of 14 cities (9% below the state average of 264 PPM). Among large cities (200k-500k), Overland Park ranks #27 of 165 for hardness. At this hardness level, water heaters run an estimated 44% less efficiently due to scale insulation, and major water-using appliances typically last 3 years less than the national average lifespan.
What Overland Park's Water Means for Your Home
Hardness: 241 PPM - Treatment Recommended
Overland Park has some seriously hard water. At 241 PPM (14.1 grains per gallon), your tap is loaded with mineral content carried in from the watershed geology. Here's the thing: it's perfectly safe to drink. The minerals won't hurt you. But they will hurt your wallet. That adds up. Hard water at 241 PPM increases household costs through scale-coated water heaters that use more energy, extra soap and detergent, and appliances that wear out faster. Most Overland Park homeowners don't realize it until the plumber shows up. That's 9% softer than the Kansas average.
Contaminants & Safety
Lead levels deserve attention. At 6.5 ppb, Overland Park 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
Overland Park's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 16.6 ppb (21% of the legal limit, but 111x the EWG guideline) and HAA5 at 9.93 ppb (17% of the legal limit, but 99x 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 1.85 ppb, which is 92x 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.
How Hard Water Affects Your Home
At 241 PPM, untreated hard water has measurable effects on household costs and appliance life:
- Water heater inefficiency: Scale insulation forces the heater to work harder (DOE estimates up to 22% more energy for heavily scaled units)
- Soap and detergent: Hard water reduces lathering, requiring significantly more product
- Appliance replacement: Water heaters, dishwashers, and washing machines fail 2-4 years earlier due to scale buildup
- Plumbing maintenance: Scale buildup in pipes reduces flow and requires more frequent service
Note: Impact varies by household size, water usage, and local energy costs. A home water test provides the most accurate assessment for your specific situation.
| Contaminant | Detected | Health Guideline | Legal Limit | Status |
|---|---|---|---|---|
| Hardness (as CaCO₃) | 241 PPM | < 60 PPM | No federal limit | ⚠ Very Hard |
| Total Dissolved Solids | 389 PPM | < 300 PPM | 500 PPM | ⚠ Elevated |
| PFAS (total) | 5.3 ppt | — | No total limit | Detected |
| ↳ PFOA | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| ↳ PFOS | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| Lead | 6.5 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ⚠ Elevated |
| Chlorine / Chloramine | 1.1 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.96 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Recommendations for Overland Park Homes
Our Top Picks for Overland Park (241 PPM)
Hard water at 241 PPM causes scale buildup, increased energy use, and premature appliance failure. A softener protects your plumbing and appliances.
Quick Fix for Chlorine: Shower Filter
At 1.1 mg/L chlorine, many Overland Park 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 Overland Park
Lead enters water from your home's plumbing, not the treatment plant — so Overland Park's city-wide average of 6.5 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 WaterOne's annual Consumer Confidence Report for official city-level data.
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About Overland Park's Water Supply
Water Utility: WaterOne
Water Source: WaterOne (Missouri River) (Surface Water)
Population Served: 482,000
Hardness: 241 PPM (14.1 grains per gallon)
Overland Park's drinking water comes from surface sources — WaterOne (Missouri River). 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. Despite the treatment process, mineral hardness from the watershed carries through. The system serves 482,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request WaterOne'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 WaterOne in Overland Park, KS, including ZIP codes:
66201, 66202, 66204, 66205, 66206, 66207, 66208, 66209, 66210, 66211, 66212, 66213, 66214, 66221, 66222, 66223, 66224, 66225, 66251, 66282, 66283
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Water Softener Sizing for Overland Park
At 241 PPM (14.1 GPG), here is how to size a softener for your Overland Park home. Multiply hardness in GPG (14.1) by daily water usage (roughly 50 gallons per person). A family of four uses about 200 gallons/day: 14.1 GPG × 200 gal = 2820 grains/day. Over a 7-day regeneration cycle, that is 19,740 grains - a 32,000-grain softener is the right fit for most Overland Park households.
Compare Overland Park to Other Kansas Cities
Frequently Asked Questions About Overland Park Water
Is Overland Park tap water safe to drink?
Where does Overland Park's water come from?
Do I need a water softener in Overland Park?
What water filter is best for Overland Park?
Does Overland Park water damage tankless water heaters?
Do I need both a softener AND a filter in Overland Park?
How much does hard water cost a Overland Park household per year?
What is the hardness of Overland Park water in grains per gallon?
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 Overland Park Homeowners Actually Buy
Common purchases for homes with 241 PPM water.
Affiliate disclosure: we may earn a commission. Selection based on Overland Park's water data.