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Tap water quality report

Mt Holly, NC

EPA monitoring detected 22 contaminants across the 2 water suppliers serving Mt Holly. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
19,258
people served
22
contaminants found
North Carolina rankings Lead in North Carolina PFAS in North Carolina

What was found in Mt Holly's water

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

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
200 µg/L 2%
of the EPA limit 10000 µg/L
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
Highest in the city: 1400 µg/L — WINDY HILL MHP · 58 people · 2019
2/2 SYR4
Fluoride
852.5 µg/L 21%
of the EPA limit 4000 µg/L
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
2/2 SYR4
Copper
364.6 µg/L 28%
of the EPA limit 1300 µg/L
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
TTHM
78 µg/L 98%
of the EPA limit 80 µg/L
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Chloroform
47 µg/L
No EPA limit set
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
37.7 µg/L 63%
of the EPA limit 60 µg/L
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Dibromochloromethane
25 µg/L
No EPA limit set
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Bromodichloromethane
22.75 µg/L
No EPA limit set
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Dichloroacetic Acid
20 µg/L
No EPA limit set
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Trichloroacetic Acid
16 µg/L
No EPA limit set
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Barium
13.9 µg/L 0.7%
of the EPA limit 2000 µg/L
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
2/2 SYR4
Dibromoacetic Acid
9.4 µg/L
No EPA limit set
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Monochloroacetic Acid
8.34 µg/L
No EPA limit set
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Monobromoacetic Acid
7.76 µg/L
No EPA limit set
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Bromoform
6.975 µg/L
No EPA limit set
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Lead
6.925 µg/L 46%
of the EPA limit 15 µg/L
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
2/2 SYR4
Carbon Tetrachloride
2.8 µg/L 56%
of the EPA limit 5 µg/L
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Xylenes, Total
1.7 µg/L 0%
of the EPA limit 10000 µg/L
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Dalapon
1.575 µg/L 0.8%
of the EPA limit 200 µg/L
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2019
1/2 SYR4
Selenium
1.2 µg/L 2.4%
of the EPA limit 50 µg/L
Highest in the city: WINDY HILL MHP · 58 people · 2019
1/2 SYR4
Combined Uranium
0.0228 µg/L 0.1%
of the EPA limit 30 µg/L
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2017
1/2 SYR4
Lead
0.0035 mg/L 23%
of the EPA limit 0.0150 mg/L
Main supplier: MOUNT HOLLY, CITY OF · 19,200 people · 2023
2/2 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. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Mt Holly

SupplierPopulation served
MOUNT HOLLY, CITY OF 19,200
WINDY HILL MHP 58

Frequently asked questions about Mt Holly tap water

Is Mt Holly tap water safe to drink?

EPA testing detected 22 contaminants in the water serving Mt Holly. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Mt Holly?

2 public water suppliers report drinking-water monitoring for Mt Holly, North Carolina to the EPA. Each is listed above with its population served.

What contaminants are in Mt Holly's water?

The contaminants EPA monitoring detected in Mt Holly include Nitrate, Fluoride, Copper, TTHM, Chloroform. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.