Water Quality in White Plains, NY

White Plains's water quality is good overall. Hardness is low at 40 PPM, and no contaminants exceed health guidelines. Most homes here do not need a water softener.

Westchester Joint Water Works · Source: Kensico Reservoir · Serves 59,387 residents

40
Hardness (PPM)
35
TDS (PPM)
1
Chlorine (mg/L)
3
PFAS (ppt)
6
Lead (ppb)
40 PPM 0 400 Slightly Hard
CONTAMINANT LEVELS Hardness 40 PPM TDS 35 PPM PFAS 3 ppt Lead 6 ppb Chlorine 1 mg/L Nitrate 1 mg/L

Hardness Scale: Where White Plains Falls

Soft 060120180250400+
Elevated lead

White Plains receives water from the NYC watershed system. The Catskill Mountain sources produce very soft water.

What White Plains's Water Means for Your Home

White Plains's water is slightly hard at 40 PPM. At this level, hard water is not a significant concern for most households. Scale buildup is minimal, and a water softener would provide little measurable benefit. If you are considering water treatment in White Plains, focus on contaminant filtration rather than softening.

Lead is the primary water quality concern for White Plains homes, especially those built before 1986 when lead solder was still legal in plumbing. At 6 ppb, White Plains's average lead level is above the health guideline of zero. Lead enters water from service lines and interior plumbing, not from the water source itself. Running cold water for 30 seconds before use reduces exposure, and a certified lead-reduction filter at the kitchen faucet provides ongoing protection.

ContaminantDetectedHealth GuidelineLegal LimitStatus
Hardness (as CaCO₃)40 PPM< 60 PPMNo federal limit✓ OK
Total Dissolved Solids35 PPM< 300 PPM500 PPM✓ OK
PFAS (total)3 ppt4 ppt (EPA)4 ppt (2024)✓ OK
Lead6 ppb0 ppb (no safe level)15 ppb (action level)⚠ Elevated
Chlorine / Chloramine1 mg/LTaste threshold ~1.04.0 mg/L✓ Normal
Nitrate1 mg/L5 mg/L10 mg/L✓ OK

Recommendations for White Plains Homes

⚠️ Lead-Reduction Filter
Lead detected at 6 ppb. There is no safe level of lead in drinking water, and children are especially vulnerable. Lead typically enters water from old plumbing, not the source water. A point-of-use filter certified to NSF/ANSI Standard 53 for lead is the most practical solution. If your home was built before 1986, testing is strongly recommended.
Learn more about this solution →

About White Plains's Water Supply

Water Utility: Westchester Joint Water Works

Water Source: Kensico Reservoir

Population Served: 59,387

Hardness: 40 PPM (2.3 grains per gallon)

Water quality can vary by neighborhood and season. The values above represent typical averages reported by Westchester Joint Water Works. 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 White Plains to Other New York Cities

New York

25 PPM · Soft

Buffalo

142 PPM · Hard

Yonkers

45 PPM · Slightly Hard

Rochester

162 PPM · Hard

Syracuse

43 PPM · Slightly Hard

Albany

39 PPM · Slightly Hard

Frequently Asked Questions About White Plains Water

Is White Plains tap water safe to drink?
White Plains's water meets EPA legal standards for drinking water safety. However, legal limits and health-optimal levels are different things. Lead levels are elevated. This is especially concerning in older buildings with lead service lines or lead solder. 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 White Plains?
Probably not. At 40 PPM, White Plains's water is on the softer end. Most homes will not experience noticeable scale buildup. That said, if you have high-end fixtures, a glass shower enclosure, or a tankless water heater, even mild hardness can leave mineral deposits over time. A salt-free conditioner is a low-cost insurance policy in that case.
What water filter is best for White Plains?
The best filter depends on which contaminants you want to address. For lead, look for NSF/ANSI Standard 53 certification specifically for lead reduction. Point-of-use filters at the kitchen faucet are the most practical approach. See our softener vs. filter guide to understand the difference between these categories.
Where does White Plains's water come from?
White Plains's drinking water is sourced from Kensico Reservoir and treated by Westchester Joint Water Works. White Plains receives water from the NYC watershed system. The Catskill Mountain sources produce very soft water.
What is the hardness of White Plains water in grains per gallon?
White Plains's water hardness is 2.3 grains per gallon (GPG), which equals 40 parts per million (PPM). This is classified as slightly hard. To convert: 1 GPG = 17.1 PPM.
Does White Plains water damage tankless water heaters?
At 2.3 GPG, White Plains's water is unlikely to cause significant issues for tankless water heaters. However, if you notice reduced flow or efficiency over time, scale buildup could be a factor. Annual flushing with vinegar is good maintenance regardless of hardness.
Is White Plains water safe for babies and infants?
Lead is the primary concern for infants and young children. White Plains's lead level of 6 ppb is elevated. Run the cold water tap for 30 seconds before using it for formula or cooking, and consider a certified lead-reduction filter for the kitchen faucet.

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