Water Quality in Broken Arrow, OK

Broken Arrow's water has very hard water (224 PPM). A water softener is recommended to protect plumbing and appliances. Read below for a full breakdown.

City of Broken Arrow · Source: Tulsa Water (Spavinaw Creek system) · Serves 113,540 residents

224
Hardness (PPM)
227
TDS (PPM)
0.8
Chlorine (mg/L)
2
PFAS (ppt)
2
Lead (ppb)
224 PPM 0 400 Very Hard
CONTAMINANT LEVELS Hardness 224 PPM TDS 227 PPM PFAS 2 ppt Lead 2 ppb Chlorine 0.8 mg/L Nitrate 3 mg/L

Hardness Scale: Where Broken Arrow Falls

Soft 060120180250400+
Very hard water

Broken Arrow purchases treated water from Tulsa. The Ozark-sourced supply is moderately hard.

What Broken Arrow's Water Means for Your Home

Broken Arrow residents deal with some of the hardest municipal water in the country. At 224 PPM (13.1 grains per gallon), the water contains high concentrations of dissolved calcium and magnesium picked up from the regional geology as surface water is treated and distributed. This is not a safety issue. The minerals are safe to consume. But they create real, measurable costs for homeowners. Hard water at 224 PPM costs the average household $800 to $1,200 per year in hidden expenses, including higher energy bills from scale-insulated water heaters, increased soap and detergent usage, and premature appliance failure. Many Broken Arrow homeowners discover this only after a water heater replacement or plumber visit.

Beyond hardness, Broken Arrow's water quality is generally within EPA guidelines for regulated contaminants. Chlorine is present at 0.8 mg/L as a disinfectant residual, which is normal for municipal water systems. If you notice a pool-like taste or experience dry skin, a whole-house carbon filter is the most common and affordable solution. For homeowners who want to understand the full picture, requesting your utility's annual Consumer Confidence Report provides neighborhood-level data.

ContaminantDetectedHealth GuidelineLegal LimitStatus
Hardness (as CaCO₃)224 PPM< 60 PPMNo federal limit⚠ Very Hard
Total Dissolved Solids227 PPM< 300 PPM500 PPM✓ OK
PFAS (total)2 ppt4 ppt (EPA)4 ppt (2024)✓ OK
Lead2 ppb0 ppb (no safe level)15 ppb (action level)✓ Low
Chlorine / Chloramine0.8 mg/LTaste threshold ~1.04.0 mg/L✓ Normal
Nitrate3 mg/L5 mg/L10 mg/L✓ OK

Recommendations for Broken Arrow Homes

🧂 Water Softener
At 224 PPM (13.1 GPG), Broken Arrow's water is very hard. Scale will accumulate in pipes, water heaters, and on fixtures. A salt-based ion exchange softener removes the calcium and magnesium causing the problem. For a typical Broken Arrow household of 2 to 4 people, a 48,000-grain softener is the right starting size.
Learn more about this solution →

About Broken Arrow's Water Supply

Water Utility: City of Broken Arrow

Water Source: Tulsa Water (Spavinaw Creek system)

Population Served: 113,540

Hardness: 224 PPM (13.1 grains per gallon)

Water quality can vary by neighborhood and season. The values above represent typical averages reported by City of Broken Arrow. To get exact numbers for your address, request a copy of the most recent Consumer Confidence Report (CCR) from your utility, or have your water independently tested.

Compare Broken Arrow to Other Oklahoma Cities

Oklahoma City

170 PPM · Hard

Tulsa

154 PPM · Hard

Norman

236 PPM · Very Hard

Edmond

197 PPM · Very Hard

Lawton

204 PPM · Very Hard

Frequently Asked Questions About Broken Arrow Water

Is Broken Arrow tap water safe to drink?
Broken Arrow's water meets EPA legal standards for drinking water safety. However, legal limits and health-optimal levels are different things. Review the contaminant table above for specific numbers and how they compare to both legal limits and health guidelines.
Do I need a water softener in Broken Arrow?
Yes. At 224 PPM (13.1 GPG), Broken Arrow's water is very hard. Without a softener, expect visible scale buildup on faucets and shower heads, reduced water heater efficiency (15 to 25 percent higher energy costs), spotted dishes and glassware, and soap that does not lather well. A salt-based water softener is the standard solution. For a typical Broken Arrow home with 2 to 4 residents, a 48,000-grain system is the most common starting size.
What water filter is best for Broken Arrow?
The best filter depends on which contaminants you want to address. See our softener vs. filter guide to understand the difference between these categories.
Where does Broken Arrow's water come from?
Broken Arrow's drinking water is sourced from Tulsa Water (Spavinaw Creek system) and treated by City of Broken Arrow. Broken Arrow purchases treated water from Tulsa. The Ozark-sourced supply is moderately hard.
What is the hardness of Broken Arrow water in grains per gallon?
Broken Arrow's water hardness is 13.1 grains per gallon (GPG), which equals 224 parts per million (PPM). This is classified as very hard. Most water softener manufacturers recommend treatment above 7 GPG. To convert: 1 GPG = 17.1 PPM.
Does Broken Arrow water damage tankless water heaters?
Yes. Most tankless water heater manufacturers recommend water hardness below 7 to 11 GPG (120 to 188 PPM). At 13.1 GPG, Broken Arrow's water exceeds this threshold. Scale buildup inside the heat exchanger reduces efficiency and can void the manufacturer's warranty. A water softener installed upstream of the tankless heater is the standard solution.
Is Broken Arrow water safe for babies and infants?
Broken Arrow's water meets all EPA safety standards and is generally considered safe for preparing infant formula. The hardness minerals (calcium and magnesium) are not harmful. If your home has older plumbing, running cold water for 30 seconds before use is a good precaution to flush any lead from pipes.
How much does hard water cost a Broken Arrow household per year?
At 224 PPM, hard water costs the average Broken Arrow household an estimated $800 to $1,200 per year in hidden costs. This includes 15 to 25 percent higher water heating bills from scale insulation, 50 to 75 percent more soap and detergent usage, shorter appliance lifespans (water heaters, dishwashers, washing machines), and increased plumbing maintenance. A water softener typically costs $600 to $1,500 installed and $50 to $100 per year in salt, which means most Broken Arrow households see a return on investment within 1 to 2 years.

Data sources. Water quality data compiled from EPA SDWIS, EWG Tap Water Database, USGS water hardness studies, and the City of Broken Arrow Consumer Confidence Report. Hardness and contaminant levels represent typical average values and may vary by neighborhood and season. Last updated: 2026-02-12.