Is Edmond, OK Tap Water Safe to Drink?
Edmond tap water is legally compliant, but one contaminant exceeds health guidelines. Specifically: PFAS above EPA limits (PFOS: 5.37 ppt — limit is 4 ppt each). A point-of-use filter is recommended for drinking and cooking water. Edmond also has very hard water at 197 PPM.
Hardness Scale: Where Edmond Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Edmond Compares
Edmond's water is 43% harder than the national average of 138 PPM. It ranks #326 out of 1000 cities in our database (harder than 67% of US cities we track). Within Oklahoma, it ranks #10 of 14 cities (9% below the state average of 217 PPM). Among cities (50k-100k), Edmond ranks #99 of 258 for hardness. At this hardness level, water heaters run an estimated 36% less efficiently due to scale insulation, and major water-using appliances typically last 3 years less than the national average lifespan.
What Edmond's Water Means for Your Home
Hardness: 197 PPM - Treatment Recommended
Edmond has some seriously hard water. At 197 PPM (11.5 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 197 PPM increases household costs through scale-coated water heaters that use more energy, extra soap and detergent, and appliances that wear out faster. Most Edmond homeowners don't realize it until the plumber shows up. That's 9% softer than the Oklahoma average.
Contaminants & Safety
Forever chemicals (PFAS) are worth watching here. Edmond has PFOS at 5.37 ppt, exceeding the EPA's 2024 limit of 4 ppt per compound. PFAS are synthetic compounds that accumulate in your body over time. A certified carbon filter or reverse osmosis system with NSF P473 certification is the most effective protection. See the regulatory timeline.
What's in the Treatment Process
Edmond's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 45.8 ppb (57% of the legal limit, but 305x the EWG guideline) and HAA5 at 5.92 ppb (10% of the legal limit, but 59x 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 9.06 ppb, which is 453x 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 197 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) | 197 PPM | < 60 PPM | No federal limit | ⚠ Very Hard |
| Total Dissolved Solids | 328 PPM | < 300 PPM | 500 PPM | ⚠ Elevated |
| PFAS (total) | 28.96 ppt | — | No total limit | Detected |
| ↳ PFOA | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| ↳ PFOS | 5.37 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| Lead | 0.8 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 0.7 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.839 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Recommendations for Edmond Homes
Our Top Picks for Edmond (197 PPM)
Hard water at 197 PPM causes scale buildup, increased energy use, and premature appliance failure. A softener protects your plumbing and appliances.
Recommended Filter for Edmond
PFAS exceed EPA limits (PFOS: 5.37 ppt — limit: 4 ppt each). A certified filter reduces these contaminants effectively.
How to Test Your Water in Edmond
With PFAS at 28.96 ppt in Edmond's supply, confirming your home's specific levels is especially important. PFAS vary by neighborhood and can concentrate differently depending on your position in the distribution system.
Free option: Request City of Edmond Water's annual Consumer Confidence Report for official city-level data.
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About Edmond's Water Supply
Water Utility: City of Edmond Water
Water Source: Arcadia Lake, Lake Hefner (Surface Water)
Population Served: 79,408
Hardness: 197 PPM (11.5 grains per gallon)
Edmond's drinking water comes from surface sources — Arcadia Lake, Lake Hefner. 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 79,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of Edmond 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 Edmond Water in Edmond, OK, including ZIP codes:
73003, 73012, 73013, 73016, 73025, 73027, 73028, 73034, 73044, 73050, 73056, 73058, 73061, 73063, 73073, 73077, 73083, 73701, 73702, 73703, 73705, 73706, 73716, 73718, 73720, 73726, 73727, 73729, 73730, 73731, 73733, 73734, 73735, 73736, 73737, 73738, 73739, 73741, 73742, 73743, 73746, 73747, 73749, 73750, 73753, 73754, 73755, 73756, 73757, 73760, 73761, 73763, 73766, 73768, 73773, 73838, 73860, 74023, 74032, 74059, 74062, 74074, 74075, 74076, 74077, 74078, 74630, 74640, 74644, 74651, 74824, 74832, 74875
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Water Softener Sizing for Edmond
At 197 PPM (11.5 GPG), here is how to size a softener for your Edmond home. Multiply hardness in GPG (11.5) by daily water usage (roughly 50 gallons per person). A family of four uses about 200 gallons/day: 11.5 GPG × 200 gal = 2300 grains/day. Over a 7-day regeneration cycle, that is 16,100 grains - a 32,000-grain softener is the right fit for most Edmond households.
Compare Edmond to Other Oklahoma Cities
Frequently Asked Questions About Edmond Water
Is Edmond tap water safe to drink?
Where does Edmond's water come from?
Do I need a water softener in Edmond?
How do I remove PFAS from Edmond tap water?
What water filter is best for Edmond?
Is Edmond water safe for babies and infants?
Does Edmond water damage tankless water heaters?
Do I need both a softener AND a filter in Edmond?
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 Edmond Homeowners Actually Buy
Prioritized for contaminant reduction for homes with 197 PPM water and PFAS above EPA limits.
Affiliate disclosure: we may earn a commission. Selection based on Edmond's water data.