What was found in ZIP 28334
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.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 1100 µg/L 11% of the EPA limit 10000 µg/L Highest in the ZIP: DUNN, CITY OF · 12,442 people · 2019 | 1/4 | SYR4 |
| Nitrate-Nitrite | 1100 µg/L 11% of the EPA limit 10000 µg/L Highest in the ZIP: DUNN, CITY OF · 12,442 people · 2019 | 1/4 | SYR4 |
| Fluoride | 749 µg/L 19% of the EPA limit 4000 µg/L Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019 | 3/4 | SYR4 |
| Chlorite | 440 µg/L 44% of the EPA limit 1000 µg/L Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019 | 1/4 | SYR4 |
| Copper | 155.55 µg/L 12% of the EPA limit 1300 µg/L Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019
Highest in the ZIP: 434.99999999999955 µg/L — JOHNSTON CO-EAST · 25,212 people · 2017 | 4/4 | SYR4 |
| Lead | 306.1999999999998 µg/L 2041% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019 | 4/4 | SYR4 |
| Cyanide | 177.5 µg/L 89% of the EPA limit 200 µg/L Highest in the ZIP: DUNN, CITY OF · 12,442 people · 2019 | 1/4 | SYR4 |
| TTHM | 69.985 µg/L 87% of the EPA limit 80 µg/L Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019
Highest in the ZIP: 84 µg/L — JOHNSTON CO-EAST · 25,212 people · 2019 | 4/4 | SYR4 |
| Chloroform | 20 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019
Highest in the ZIP: 68.39999999999998 µg/L — JOHNSTON CO-EAST · 25,212 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 30.764999999999993 µg/L 51% of the EPA limit 60 µg/L Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019
Highest in the ZIP: 47.324999999999996 µg/L — SAMPSON CO WTR DIST II · 12,895 people · 2019 | 4/4 | SYR4 |
| Dibromochloromethane | 28.724999999999994 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019
Highest in the ZIP: 30.14999999999999 µg/L — DUNN, CITY OF · 12,442 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 18 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019
Highest in the ZIP: 27.099999999999994 µg/L — DUNN, CITY OF · 12,442 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 20.5 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019
Highest in the ZIP: 26.125 µg/L — SAMPSON CO WTR DIST II · 12,895 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 5.9 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019
Highest in the ZIP: 23.14999999999999 µg/L — JOHNSTON CO-EAST · 25,212 people · 2019 | 4/4 | SYR4 |
| Bromoform | 20.095000000000052 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019
Highest in the ZIP: 22 µg/L — DUNN, CITY OF · 12,442 people · 2019 | 4/4 | SYR4 |
| Dibromoacetic Acid | 11.5 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019 | 4/4 | SYR4 |
| Monobromoacetic Acid | 1.2 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019
Highest in the ZIP: 10.5 µg/L — JOHNSTON CO-EAST · 25,212 people · 2019 | 3/4 | SYR4 |
| Monochloroacetic Acid | 4.040000000000001 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2019
Highest in the ZIP: 6.549999999999999 µg/L — JOHNSTON CO-EAST · 25,212 people · 2019 | 4/4 | SYR4 |
| Gross Beta Particle Activity | 6.015 pCi/L No EPA limit set Highest in the ZIP: DUNN, CITY OF · 12,442 people · 2018 | 1/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 4.3 µg/L 72% of the EPA limit 6 µg/L Highest in the ZIP: SAMPSON CO WTR DIST II · 12,895 people · 2019 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 1.29 pCi/L 26% of the EPA limit 5 pCi/L Highest in the ZIP: SAMPSON CO WTR DIST II · 12,895 people · 2016 | 1/4 | SYR4 |
| Atrazine | 0.4120 µg/L 14% of the EPA limit 3 µg/L Highest in the ZIP: DUNN, CITY OF · 12,442 people · 2019 | 2/4 | SYR4 |
| Simazine | 0.3510 µg/L 8.8% of the EPA limit 4 µg/L Highest in the ZIP: JOHNSTON CO-EAST · 25,212 people · 2019 | 2/4 | SYR4 |
| Pfpea | 0.0069 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2025
Highest in the ZIP: 0.0224 µg/L — DUNN, CITY OF · 12,442 people · 2024 | 3/4 | UCMR-5 |
| Pfhxa | 0.0071 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2025
Highest in the ZIP: 0.0204 µg/L — DUNN, CITY OF · 12,442 people · 2024 | 3/4 | UCMR-5 |
| Pfba | 0.0144 µg/L No EPA limit set Highest in the ZIP: JOHNSTON CO-EAST · 25,212 people · 2024 | 2/4 | UCMR-5 |
| PFOS | 0.0123 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2025
Highest in the ZIP: 0.0144 µg/L — DUNN, CITY OF · 12,442 people · 2024 | 3/4 | UCMR-5 |
| PFBS | 0.0034 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2025
Highest in the ZIP: 0.0142 µg/L — DUNN, CITY OF · 12,442 people · 2024 | 3/4 | UCMR-5 |
| PFOA | 0.0077 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2025
Highest in the ZIP: 0.0120 µg/L — DUNN, CITY OF · 12,442 people · 2024 | 3/4 | UCMR-5 |
| Pfhpa | 0.0036 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2025
Highest in the ZIP: 0.0076 µg/L — DUNN, CITY OF · 12,442 people · 2024 | 3/4 | UCMR-5 |
| PFHXS | 0.0031 µg/L No EPA limit set Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2025
Highest in the ZIP: 0.0052 µg/L — DUNN, CITY OF · 12,442 people · 2024 | 3/4 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: HARNETT REGIONAL WATER · 121,885 people · 2025 | 4/4 | 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 28334
| Supplier | State | Population served |
|---|---|---|
| HARNETT REGIONAL WATER | NC | 121,885 |
| JOHNSTON CO-EAST | NC | 25,212 |
| SAMPSON CO WTR DIST II | NC | 12,895 |
| DUNN, CITY OF | NC | 12,442 |
Frequently asked questions about ZIP 28334 tap water
Is the tap water in ZIP 28334 safe to drink?
EPA testing detected 32 contaminants across the water suppliers serving ZIP 28334. 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 28334?
4 public water suppliers report EPA drinking-water monitoring for ZIP 28334. Each is listed above with its population served.
What contaminants are in ZIP 28334's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Chlorite, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.