How does East Flatbush's water compare to the national average?

The USA national average is 151 mg/L. East Flatbush (≈ 0–59 mg/L) is 121 mg/L softer than average.

East Flatbush Water Hardness & Quality Report (2026)

Water Hardness

soft

~0–59 mg/L

Soft

estimated · not lab-verified

Source

reservoir

pH Level

8.2

neutral = 7.0

Lead

0.009 mg/L

✓ Below action level

TDS

428.6 mg/L

Est. Daily Cost

$0.08

energy & soap waste

Source: See methodology section below · Updated 2026

soft~0–59 mg/LSoft · est.

0–60

mg/L

Soft

61–120

mg/L

Moderately Hard

121–180

mg/L

Hard

180+

mg/L

Very Hard

Appliance Damage Report

In East Flatbush, your appliances are currently losing 4% efficiency due to mineral buildup.

Appliance	In East Flatbush	Soft Water City	Efficiency Loss
Kettle	8.2 yrs	8.5 yrs	-4%
Washing Machine	11.5 yrs	12 yrs	-4%
Water Heater	14.4 yrs	15 yrs	-4%

Regional Water Comparison

How East Flatbush compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ East Flatbush, New York	≈ 0–59 mg/L	8 ppt	🟢 Soft	reservoir
Brownsville, New York	156 mg/L	7.5 ppt	🟠 Hard	reservoir
Brooklyn, New York	≈ 60–120 mg/L	5 ppt	🟡 Moderately Hard	groundwater
Flatbush, New York	≈ 0–60 mg/L	5.8 ppt	🟢 Soft	reservoir
Canarsie, New York	≈ 120–179 mg/L	4.1 ppt	🟠 Hard	reservoir

National Benchmark

How East Flatbush compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ East Flatbush	≈ 0–59 mg/L	🟢 None
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

Bring Scarsdale-quality water to your East Flatbush home

Shop water softeners on Amazon.com →

Shop Now

What Makes East Flatbush's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 428.6 mg/LpH: 8.2

New York City Department of Environmental Protection (DEP) supplies water to East Flatbush in Brooklyn, Kings County. Primary sources are the Catskill/Delaware watershed reservoirs—including Ashokan, Schoharie, Rondout, Neversink, Pepacton, and Cannonsville—and Croton watershed reservoirs such as New Croton, Cross River, and Titicus. Water is treated at facilities including the Catskill/Delaware Ultraviolet Disinfection Facility and Hillview Treatment Facility before distribution through the city's aqueduct and tunnel system to over 8 million residents across the five boroughs.

The Catskill/Delaware system drains 1,600 square miles of forested uplands in the Catskill Mountains, underlain by erosion-resistant Devonian-age shales and sandstones with minimal carbonate rocks, yielding very soft water low in dissolved solids. The Croton watershed, covering 375 square miles in Putnam and Westchester Counties, features limestone and dolostone outcrops from Ordovician and Silurian periods, imparting moderate mineralization. Blending these protected upland sources, combined with thin glacial overburden that limits mineral leaching, results in a citywide moderately soft character.

As soft to moderately soft water, East Flatbush supply lathers easily with soap, reducing detergent use and preventing scale buildup in pipes, water heaters, and dishwashers. Appliances like coffee makers and washing machines experience minimal mineral deposits, extending lifespan without special maintenance. No water softener is needed; occasional vinegar rinses suffice for light spotting on glassware. NYC DEP water maintains pH 6.5–8.5, fully compliant with EPA standards. The lead/copper rule is met via corrosion control and <15 ppb action level compliance; no PFAS exceedances reported. Treatment includes filtration, chlorination, UV disinfection, and fluoridation at 0.7 ppm.

Geology & Source: Catskill/Delaware watersheds — Devonian shales, sandstones, schists with minimal carbonates yield soft supply; Croton watershed adds Ordovician/Silurian limestone influence; glacial till limits leaching, overall soft on blending

Other New York Water Reports

Brownsville

156 mg/L

🟠 Hard

Brooklyn

≈ 60–120 mg/L

🟡 Moderately Hard

Flatbush

≈ 0–60 mg/L

🟢 Soft

Canarsie

≈ 120–179 mg/L

🟠 Hard

Report an Issue

Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is East Flatbush's water safe to drink?

Yes. East Flatbush's water meets all federal safety standards. The hardness is ≈ 0–59 mg/L (Soft), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in East Flatbush?

East Flatbush's water is soft at ≈ 0–59 mg/L. A water softener is generally not necessary, though a carbon filter can improve taste and remove any remaining chlorine.

How does East Flatbush compare to the USA average?

The USA national average is 151 mg/L. East Flatbush (≈ 0–59 mg/L) is 121 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for East Flatbush is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

Water Hardness

Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

TDS — Total Dissolved Solids

Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.

Measured

PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances

EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.

Modelled

Lead

Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.

Calculated

Appliance Lifespan

Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.