Copiague, NY water hardness

Tap water hardness
10mg/L
0.6gpg
Soft

Reported by South Farmingdale WD · September 2025

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

The water in Copiague carries roughly 10 mg/L of dissolved calcium and magnesium, or 0.6 grains per gallon. That is soft water. The number comes from South Farmingdale WD, dated September 2025.

Copiague on the hardness scale, with nearby cities
060120180240300360+NY typical 31Massapequa Park: 8 mg/LMassapequa Park 8Amityville: 10 mg/LAmityville 10Lindenhurst: 10 mg/LLindenhurst 10North Amityville: 10 mg/LNorth Amityville 10East Massapequa: 10 mg/LEast Massapequa 10North Lindenhurst: 10 mg/LNorth Lindenhurst 10Massapequa: 10 mg/LMassapequa 10South Farmingdale: 10 mg/LSouth Farmingdale 10North Massapequa: 10 mg/LNorth Massapequa 10Babylon: 33 mg/LBabylon 33Copiague 10mg/L as calcium carbonate060120180240300360+NY 31Massapequa Park: 8 mg/LMassapequa. 8Amityville: 10 mg/LAmityville 10Lindenhurst: 10 mg/LLindenhurst 10North Amityville: 10 mg/LNorth Amit. 10East Massapequa: 10 mg/LEast Massa. 10North Lindenhurst: 10 mg/LNorth Lind. 1010 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 10 mg/L, Copiague is 21 mg/L below the typical New York figure of 31. Of the 10 nearest cities we track, 1 has softer water and 1 has harder. The range nearby runs from 8 mg/L in Massapequa Park to 33 in Babylon.

What 10 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 10 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 Copiague's water system

South Farmingdale WD · PWSID NY2902854

No health-based violations since 2016

Serves about 44,700 people from groundwater.

Health-based
0
Monitoring or reporting
0
Open now
0

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

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 Copiague water hard?

No. It measures about 10 mg/L (0.6 grains per gallon), which the USGS classes as soft.

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

About 0.6 gpg. One grain per gallon equals 17.1 mg/L, so 10 mg/L divided by 17.1 gives 0.6.

Has the Copiague water system had EPA violations?

EPA records show no health-based violations for South Farmingdale WD since 2016.

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.