Seaford, NY water hardness

Tap water hardness
13mg/L
0.8gpg
Soft

Reported by Liberty Utilities New York - Merrick · September 2025

NY typical
31 mg/L
EPA health violations since 2016
3
Data
Utility report

Seaford water measures 13 mg/L (0.8 gpg) of hardness, soft by USGS standards. The number comes from Liberty Utilities New York - Merrick, dated September 2025.

Seaford on the hardness scale, with nearby cities
060120180240300360+NY typical 31Massapequa Park: 8 mg/LMassapequa Park 8Wantagh: 10 mg/LWantagh 10Massapequa: 10 mg/LMassapequa 10North Wantagh: 10 mg/LNorth Wantagh 10North Massapequa: 10 mg/LNorth Massapequa 10East Massapequa: 10 mg/LEast Massapequa 10Amityville: 10 mg/LAmityville 10Plainedge: 10 mg/LPlainedge 10Merrick: 42 mg/LMerrick 42North Merrick: 42 mg/LNorth Merrick 42Seaford 13mg/L as calcium carbonate060120180240300360+NY 31Massapequa Park: 8 mg/LMassapequa. 8Wantagh: 10 mg/LWantagh 10Massapequa: 10 mg/LMassapequa 10North Wantagh: 10 mg/LNorth Want. 10North Massapequa: 10 mg/LNorth Mass. 10East Massapequa: 10 mg/LEast Massa. 1013 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 13 mg/L, Seaford is 18 mg/L below the typical New York figure of 31. Of the 10 nearest cities we track, 8 have softer water and 2 have harder. The range nearby runs from 8 mg/L in Massapequa Park to 42 in Merrick.

What 13 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 13 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 Seaford's water system

Liberty Utilities New York - Merrick · PWSID NY2902840

3 health-based violations since 2016

Serves about 135,000 people from groundwater.

Health-based
3
Monitoring or reporting
0
Open now
0

TapWaterData ties Seaford to this system. EPA's service-area records do not name Seaford, so check the utility printed on your water bill.

20162017201820192020202120222023202420252026Lead and Copper Rule'16'18'20'22'24'26Lead and Copper Rule
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Lead and Copper Rulecorrosion control and lead sampling32023–2024Resolved

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 Seaford water hard?

No. It measures about 13 mg/L (0.8 grains per gallon), which the USGS classes as soft.

What is the water hardness in Seaford in grains per gallon?

About 0.8 gpg. One grain per gallon equals 17.1 mg/L, so 13 mg/L divided by 17.1 gives 0.8.

Has the Seaford water system had EPA violations?

EPA records show 3 health-based violations for Liberty Utilities New York - Merrick since 2016, involving Lead and Copper Rule.

Nearby cities

All 149 cities in New York

Hardness data: TapWaterData US Water Hardness (utility report, September 22, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.