Tap WaterIndex

← Hempstead, NY

Tap water quality report

ZIP 11509 — Hempstead, NY

EPA monitoring across the 1 water supplier serving ZIP 11509 in Hempstead, NY detected 34 contaminants. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier below, with the EPA limit for each.

1
water supplier
220,000
people served
34
contaminants found

What was found in ZIP 11509

The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
166.05 µg/L 13%
of the EPA limit 1300 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Fluoride
140 µg/L 3.5%
of the EPA limit 4000 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Nitrate
140 µg/L 1.4%
of the EPA limit 10000 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Nitrate-Nitrite
132 µg/L 1.3%
of the EPA limit 10000 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Barium
26 µg/L 1.3%
of the EPA limit 2000 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Lithium
14.9 µg/L
No EPA limit set
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2025
1/1 UCMR-5
Chromium
10 µg/L 10%
of the EPA limit 100 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Tetrachloroethylene
9.41 µg/L 188%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
TTHM
9.18 µg/L 11%
of the EPA limit 80 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Lead
7.49 µg/L 50%
of the EPA limit 15 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Combined Uranium
5.018 µg/L 17%
of the EPA limit 30 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
4.9555 pCi/L 33%
of the EPA limit 15 pCi/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Gross Beta Particle Activity
4.865 pCi/L
No EPA limit set
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
4.2725 pCi/L 85%
of the EPA limit 5 pCi/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Monochloroacetic Acid
3.12 µg/L
No EPA limit set
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Dibromochloromethane
3.1 µg/L
No EPA limit set
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Bromoform
2.775 µg/L
No EPA limit set
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Chloroform
2.476 µg/L
No EPA limit set
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Arsenic
2.055 µg/L 21%
of the EPA limit 10 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Bromodichloromethane
2 µg/L
No EPA limit set
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Thallium, Total
1.8335 µg/L 92%
of the EPA limit 2 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Di(2-ethylhexyl) Phthalate
1.7 µg/L 28%
of the EPA limit 6 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Trichloroacetic Acid
1.6 µg/L
No EPA limit set
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
1.495 µg/L 2.5%
of the EPA limit 60 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Monobromoacetic Acid
1.38 µg/L
No EPA limit set
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Dibromoacetic Acid
1.26 µg/L
No EPA limit set
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Trichloroethylene
1.21 µg/L 24%
of the EPA limit 5 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
cis-1,2-Dichloroethylene
0.9350 µg/L 1.3%
of the EPA limit 70 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Antimony, Total
0.8100 µg/L 14%
of the EPA limit 6 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
Beryllium, Total
0.5000 µg/L 13%
of the EPA limit 4 µg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
1/1 SYR4
PFHXS
0.0063 µg/L
No EPA limit set
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2025
1/1 UCMR-5
PFOS
0.0051 µg/L
No EPA limit set
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2025
1/1 UCMR-5
Lead
0.0042 mg/L 28%
of the EPA limit 0.0150 mg/L
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2025
1/1 LCR
PFNA
0.0041 µg/L
No EPA limit set
Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2025
1/1 UCMR-5
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.

Water suppliers serving ZIP 11509

SupplierStatePopulation served
LIBERTY UTILITIES NEW YORK - LYNBROOK NY 220,000

Frequently asked questions about ZIP 11509 tap water

Is the tap water in ZIP 11509 safe to drink?

EPA testing detected 34 contaminants across the water suppliers serving ZIP 11509. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.

Which water suppliers serve ZIP 11509?

1 public water supplier report EPA drinking-water monitoring for ZIP 11509. Each is listed above with its population served.

What contaminants are in ZIP 11509's water?

EPA monitoring detected Copper, Fluoride, Nitrate, Nitrate-Nitrite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.