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Tap water quality report

ZIP 29928 — Hilton Head Island, SC

EPA monitoring across the 3 water suppliers serving ZIP 29928 in Hilton Head Island, SC detected 21 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.

3
water suppliers
47,338
people served
21
contaminants found

What was found in ZIP 29928

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
Fluoride
537.5 µg/L 13%
of the EPA limit 4000 µg/L
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2018
Highest in the ZIP: 779.5 µg/L — SOUTH ISLAND PSD (SC0720001) · 18,299 people · 2017
3/3 SYR4
Nitrate
180 µg/L 1.8%
of the EPA limit 10000 µg/L
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2019
2/3 SYR4
Copper
170 µg/L 13%
of the EPA limit 1300 µg/L
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2018
Highest in the ZIP: 175.5 µg/L — BROAD CREEK PSD (SC0720009) · 3,481 people · 2019
3/3 SYR4
TTHM
34.908 µg/L 44%
of the EPA limit 80 µg/L
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2019
Highest in the ZIP: 63.8379 µg/L — SOUTH ISLAND PSD (SC0720001) · 18,299 people · 2019
3/3 SYR4
Bromoform
7.235 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2019
Highest in the ZIP: 37.246 µg/L — SOUTH ISLAND PSD (SC0720001) · 18,299 people · 2019
3/3 SYR4
Total Haloacetic Acids (HAA5)
36.296 µg/L 60%
of the EPA limit 60 µg/L
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2019
3/3 SYR4
Dibromochloromethane
12.42 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2019
Highest in the ZIP: 22.1865 µg/L — SOUTH ISLAND PSD (SC0720001) · 18,299 people · 2019
3/3 SYR4
Lithium
10.6 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2025
Highest in the ZIP: 21.3 µg/L — BROAD CREEK PSD (SC0720009) · 3,481 people · 2024
3/3 UCMR-5
Dichloroacetic Acid
18.169 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2019
3/3 SYR4
Monochloroacetic Acid
16.8807 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2019
1/3 SYR4
Chloroform
15.63 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2019
3/3 SYR4
Trichloroacetic Acid
12.96 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2019
3/3 SYR4
Monobromoacetic Acid
6.149 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2019
Highest in the ZIP: 11.792 µg/L — SOUTH ISLAND PSD (SC0720001) · 18,299 people · 2019
3/3 SYR4
Dibromoacetic Acid
4.297 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2019
Highest in the ZIP: 11.5845 µg/L — SOUTH ISLAND PSD (SC0720001) · 18,299 people · 2019
3/3 SYR4
Lead
9.285 µg/L 62%
of the EPA limit 15 µg/L
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2018
Highest in the ZIP: 10.205 µg/L — SOUTH ISLAND PSD (SC0720001) · 18,299 people · 2019
3/3 SYR4
Bromodichloromethane
10.111 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2019
3/3 SYR4
PFOS
0.0052 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2025
1/3 UCMR-5
PFOA
0.0051 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2025
1/3 UCMR-5
PFBS
0.0043 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2025
1/3 UCMR-5
Pfpea
0.0030 µg/L
No EPA limit set
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2025
1/3 UCMR-5
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: HILTON HEAD PSD 1 (0720006) · 25,558 people · 2024
Highest in the ZIP: 0.0021 mg/L — SOUTH ISLAND PSD (SC0720001) · 18,299 people · 2025
3/3 LCR
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 29928

SupplierStatePopulation served
HILTON HEAD PSD 1 (0720006) SC 25,558
SOUTH ISLAND PSD (SC0720001) SC 18,299
BROAD CREEK PSD (SC0720009) SC 3,481

Frequently asked questions about ZIP 29928 tap water

Is the tap water in ZIP 29928 safe to drink?

EPA testing detected 21 contaminants across the water suppliers serving ZIP 29928. 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 29928?

3 public water suppliers report EPA drinking-water monitoring for ZIP 29928. Each is listed above with its population served.

What contaminants are in ZIP 29928's water?

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