Dyker Heights Water Hardness & Quality Report (2026)
Water Hardness
9.1 grains per gallon
Source
reservoir
pH Level
8.1
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
386.2 mg/L
Est. Daily Cost
$0.42
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
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 Dyker Heights, your appliances are currently losing 21% efficiency due to mineral buildup.
| Appliance | In Dyker Heights | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.4 yrs | 8.5 yrs | -48% |
| Washing Machine | 7.8 yrs | 12 yrs | -35% |
| Water Heater | 9.3 yrs | 15 yrs | -38% |
Regional Water Comparison
How Dyker Heights compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Dyker Heights, New York | 156.5 mg/L | 7.5 ppt | 🟠 Hard | reservoir |
| Bath Beach, New York | 167 mg/L | 8 ppt | 🟠 Hard | reservoir |
| Borough Park, New York | 126.5 mg/L | 6.1 ppt | 🟠 Hard | reservoir |
| Fort Hamilton, New York | 132.5 mg/L | 6.4 ppt | 🟠 Hard | reservoir |
| Sunset Park, New York | 158 mg/L | 7.6 ppt | 🟠 Hard | reservoir |
National Benchmark
How Dyker Heights compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Dyker Heights | 156.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Dyker Heights's Water Unique?
Local geology and source profile
Dyker Heights, Brooklyn, New York — a major southwest Brooklyn neighborhood in Kings County (Dyker Heights is one of Brooklyn's most distinctive neighborhoods — primarily a middle-class Italian-American and Chinese-American residential community in southwest Brooklyn known for its exceptionally large single-family homes and especially its famous Christmas light displays), known internationally for its Christmas decorations (the Dyker Heights Christmas light displays have become one of New York City's major holiday tourist attractions — some homes spend $100,000 or more on elaborate professional Christmas light installations; bus tours from Manhattan visit Dyker Heights throughout December), a diverse Kings County community with a significant Italian-American, Chinese-American, and Russian-American population, and a southwest Brooklyn community — draws its municipal water supply via the NYC DEP. Water hardness in Dyker Heights measures 156.5 mg/L — classified as hard.
Dyker Heights's hard supply — significantly harder than Greenpoint Brooklyn (94 mg/L) — reflects variation in the NYC Brooklyn distribution system. The NYC Catskill–Delaware supply (raw hardness approximately 30–100 mg/L at the source) is distributed through the southwest Brooklyn Dyker Heights zone via older Brooklyn south distribution mains (primarily pre-WWII southwest Brooklyn infrastructure), where the 156.5 mg/L reflects distribution zone characteristics different from the north Brooklyn zone.
At 156.5 mg/L, Dyker Heights residents encounter moderate-to-hard scale accumulation. Monthly cleaning with citric acid solution is recommended. NYC DEP consistently delivers water meeting all New York State DEC and EPA Safe Drinking Water Act requirements.
Geology & Source: Reservoir supply from the Catskill–Delaware watershed (Catskill Mountains) via the New York City Department of Environmental Protection (DEP) — the Kings County southwest Brooklyn Dyker Heights neighborhood (Catskill Mountains calcareous-poor Devonian sandstone and shale — the NYC Catskill–Delaware supply; Dyker Heights southwest Brooklyn distribution zone); hard supply at 156.5 mg/L in Kings County.