Franklin Square, NY water hardness

Tap water hardness
48mg/L
2.8gpg
Soft

Reported by WA of Western Nassau · October 2025

NY typical
31 mg/L
EPA health violations since 2016
0
Data
Utility report

Franklin Square water measures 48 mg/L (2.8 gpg) of hardness, soft by USGS standards. The number comes from WA of Western Nassau, dated October 2025.

Franklin Square on the hardness scale, with nearby cities
060120180240300360+NY typical 31Lynbrook: 32 mg/LLynbrook 32Lakeview: 39 mg/LLakeview 39West Hempstead: 48 mg/LWest Hempstead 48Malverne: 51 mg/LMalverne 51Garden City: 51 mg/LGarden City 51Garden City Park: 51 mg/LGarden City Park 51New Hyde Park: 53 mg/LNew Hyde Park 53Elmont: 55 mg/LElmont 55North Valley Stream: 55 mg/LNorth Valley Stream 55Floral Park: 55 mg/LFloral Park 55Franklin Square 48mg/L as calcium carbonate060120180240300360+NY 31Lakeview: 39 mg/LLakeview 39West Hempstead: 48 mg/LWest Hemps. 48Malverne: 51 mg/LMalverne 51Elmont: 55 mg/LElmont 55North Valley Stream: 55 mg/LNorth Vall. 55Floral Park: 55 mg/LFloral Park 5548 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Franklin Square sits 17 mg/L above the typical New York figure of 31. Of the 10 nearest cities we track, 2 have softer water and 7 have harder. The range nearby runs from 32 mg/L in Lynbrook to 55 in Elmont.

What 48 mg/L means at home

Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.

Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.

Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.

What to do about it

Nothing, as far as hardness goes. At 48 mg/L a softener would have almost nothing to remove.

Carbon filter

If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.

EPA record for Franklin Square's water system

Franklin Square WD · PWSID NY2902822

No health-based violations since 2016

Serves about 20,000 people from groundwater.

Health-based
0
Monitoring or reporting
28
Open now
0

EPA lists Franklin Square WD as the system serving Franklin Square. The hardness figure above comes from a different system's report, which TapWaterData uses for Franklin Square.

Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.

Questions

Is Franklin Square water hard?

No. It measures about 48 mg/L (2.8 grains per gallon), which the USGS classes as soft.

What is the water hardness in Franklin Square in grains per gallon?

About 2.8 gpg. One grain per gallon equals 17.1 mg/L, so 48 mg/L divided by 17.1 gives 2.8.

Has the Franklin Square water system had EPA violations?

EPA records show no health-based violations for Franklin Square WD since 2016. There were also 28 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 149 cities in New York

Hardness data: TapWaterData US Water Hardness (utility report, October 15, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.