Water Quality in Yonkers, NY

Yonkers's water quality is good overall. Hardness is low at 45 PPM, and no contaminants exceed health guidelines. Most homes here do not need a water softener.

City of Yonkers · Source: NYC system (Catskill/Delaware) · Serves 211,569 residents

45
Hardness (PPM)
65
TDS (PPM)
1.1
Chlorine (mg/L)
3
PFAS (ppt)
4
Lead (ppb)
45 PPM 0 400 Slightly Hard
CONTAMINANT LEVELS Hardness 45 PPM TDS 65 PPM PFAS 3 ppt Lead 4 ppb Chlorine 1.1 mg/L Nitrate 2 mg/L

Hardness Scale: Where Yonkers Falls

Soft 060120180250400+
Soft water

Yonkers's water comes from protected surface sources typical of the Northeast. At 45 PPM, the water is relatively soft. The primary concern in older northeastern cities is lead from aging plumbing infrastructure, particularly in buildings constructed before 1986.

What Yonkers's Water Means for Your Home

Yonkers's water is slightly hard at 45 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 Yonkers, focus on contaminant filtration rather than softening.

Beyond hardness, Yonkers's water quality is generally within EPA guidelines for regulated contaminants. Chlorine is present at 1.1 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)45 PPM< 60 PPMNo federal limit✓ OK
Total Dissolved Solids65 PPM< 300 PPM500 PPM✓ OK
PFAS (total)3 ppt4 ppt (EPA)4 ppt (2024)✓ OK
Lead4 ppb0 ppb (no safe level)15 ppb (action level)✓ Low
Chlorine / Chloramine1.1 mg/LTaste threshold ~1.04.0 mg/L✓ Normal
Nitrate2 mg/L5 mg/L10 mg/L✓ OK

Good news for ${esc(c.city)} residents. Your water quality is generally good. Most homes in this area do not need a water softener. If you have concerns about lead (especially in buildings constructed before 1986) or chlorine taste, a point-of-use filter is the most practical and cost-effective solution.

About Yonkers's Water Supply

Water Utility: City of Yonkers

Water Source: NYC system (Catskill/Delaware)

Population Served: 211,569

Hardness: 45 PPM (2.6 grains per gallon)

Water quality can vary by neighborhood and season. The values above represent typical averages reported by City of Yonkers. 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 Yonkers to Other New York Cities

New York

25 PPM · Soft

Buffalo

142 PPM · Hard

Rochester

162 PPM · Hard

Syracuse

43 PPM · Slightly Hard

Albany

39 PPM · Slightly Hard

White Plains

40 PPM · Slightly Hard

Frequently Asked Questions About Yonkers Water

Is Yonkers tap water safe to drink?
Yonkers'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 Yonkers?
Probably not. At 45 PPM, Yonkers'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 Yonkers?
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 Yonkers's water come from?
Yonkers's drinking water is sourced from NYC system (Catskill/Delaware) and treated by City of Yonkers. Yonkers's water comes from protected surface sources typical of the Northeast. At 45 PPM, the water is relatively soft.
What is the hardness of Yonkers water in grains per gallon?
Yonkers's water hardness is 2.6 grains per gallon (GPG), which equals 45 parts per million (PPM). This is classified as slightly hard. To convert: 1 GPG = 17.1 PPM.
Does Yonkers water damage tankless water heaters?
At 2.6 GPG, Yonkers'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 Yonkers water safe for babies and infants?
Yonkers'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.

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