What was found in ZIP 27520
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 |
|---|---|---|---|
| Fluoride | 780 µg/L 20% of the EPA limit 4000 µg/L Main supplier: RALEIGH, CITY OF · 650,000 people · 2019 | 2/3 | SYR4 |
| Copper | 90.6 µg/L 7% of the EPA limit 1300 µg/L Main supplier: RALEIGH, CITY OF · 650,000 people · 2019
Highest in the ZIP: 144 µg/L — JOHNSTON CO-WEST · 99,027 people · 2018 | 3/3 | SYR4 |
| TTHM | 53.31 µg/L 67% of the EPA limit 80 µg/L Main supplier: RALEIGH, CITY OF · 650,000 people · 2019
Highest in the ZIP: 75 µg/L — JOHNSTON CO-WEST · 99,027 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 36.871 µg/L 61% of the EPA limit 60 µg/L Main supplier: RALEIGH, CITY OF · 650,000 people · 2019
Highest in the ZIP: 65.1 µg/L — JOHNSTON CO-WEST · 99,027 people · 2019 | 3/3 | SYR4 |
| Lead | 54.45 µg/L 363% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: RALEIGH, CITY OF · 650,000 people · 2019 | 3/3 | SYR4 |
| Chloroform | 41.6 µg/L No EPA limit set Main supplier: RALEIGH, CITY OF · 650,000 people · 2019
Highest in the ZIP: 48.55 µg/L — JOHNSTON CO-WEST · 99,027 people · 2019 | 3/3 | SYR4 |
| Bromoform | 27.75 µg/L No EPA limit set Highest in the ZIP: JOHNSTON CO-WEST · 99,027 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 23.33 µg/L No EPA limit set Main supplier: RALEIGH, CITY OF · 650,000 people · 2019
Highest in the ZIP: 26.085 µg/L — CLAYTON, TOWN OF · 30,876 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 4 µg/L No EPA limit set Main supplier: RALEIGH, CITY OF · 650,000 people · 2019
Highest in the ZIP: 25.55 µg/L — JOHNSTON CO-WEST · 99,027 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 11.78 µg/L No EPA limit set Main supplier: RALEIGH, CITY OF · 650,000 people · 2019
Highest in the ZIP: 20.05 µg/L — JOHNSTON CO-WEST · 99,027 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 11 µg/L No EPA limit set Main supplier: RALEIGH, CITY OF · 650,000 people · 2019
Highest in the ZIP: 16 µg/L — JOHNSTON CO-WEST · 99,027 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 1.504 µg/L No EPA limit set Main supplier: RALEIGH, CITY OF · 650,000 people · 2019
Highest in the ZIP: 13.5 µg/L — JOHNSTON CO-WEST · 99,027 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 3.36 µg/L No EPA limit set Main supplier: RALEIGH, CITY OF · 650,000 people · 2019
Highest in the ZIP: 13.35 µg/L — JOHNSTON CO-WEST · 99,027 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 1.4 µg/L No EPA limit set Main supplier: RALEIGH, CITY OF · 650,000 people · 2019
Highest in the ZIP: 11 µg/L — JOHNSTON CO-WEST · 99,027 people · 2019 | 3/3 | SYR4 |
| Bromate | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: RALEIGH, CITY OF · 650,000 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1 pCi/L 20% of the EPA limit 5 pCi/L Main supplier: RALEIGH, CITY OF · 650,000 people · 2017 | 1/3 | SYR4 |
| Mercury | 1 µg/L 50% of the EPA limit 2 µg/L Highest in the ZIP: JOHNSTON CO-WEST · 99,027 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 1 µg/L 50% of the EPA limit 2 µg/L Main supplier: RALEIGH, CITY OF · 650,000 people · 2019 | 1/3 | SYR4 |
| Toluene | 0.8000 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the ZIP: JOHNSTON CO-WEST · 99,027 people · 2019 | 1/3 | SYR4 |
| Simazine | 0.4050 µg/L 10% of the EPA limit 4 µg/L Highest in the ZIP: JOHNSTON CO-WEST · 99,027 people · 2019 | 1/3 | SYR4 |
| Atrazine | 0.1780 µg/L 5.9% of the EPA limit 3 µg/L Highest in the ZIP: JOHNSTON CO-WEST · 99,027 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0090 µg/L No EPA limit set Main supplier: RALEIGH, CITY OF · 650,000 people · 2024
Highest in the ZIP: 0.0156 µg/L — JOHNSTON CO-WEST · 99,027 people · 2025 | 2/3 | UCMR-5 |
| PFOS | 0.0056 µg/L No EPA limit set Main supplier: RALEIGH, CITY OF · 650,000 people · 2024
Highest in the ZIP: 0.0141 µg/L — JOHNSTON CO-WEST · 99,027 people · 2025 | 3/3 | UCMR-5 |
| Pfhxa | 0.0042 µg/L No EPA limit set Main supplier: RALEIGH, CITY OF · 650,000 people · 2024
Highest in the ZIP: 0.0092 µg/L — JOHNSTON CO-WEST · 99,027 people · 2025 | 3/3 | UCMR-5 |
| Pfpea | 0.0043 µg/L No EPA limit set Main supplier: RALEIGH, CITY OF · 650,000 people · 2024
Highest in the ZIP: 0.0092 µg/L — JOHNSTON CO-WEST · 99,027 people · 2025 | 3/3 | UCMR-5 |
| PFOA | 0.0082 µg/L No EPA limit set Highest in the ZIP: CLAYTON, TOWN OF · 30,876 people · 2024 | 2/3 | UCMR-5 |
| PFHXS | 0.0053 µg/L No EPA limit set Highest in the ZIP: JOHNSTON CO-WEST · 99,027 people · 2025 | 1/3 | UCMR-5 |
| Pfhpa | 0.0050 µg/L No EPA limit set Highest in the ZIP: JOHNSTON CO-WEST · 99,027 people · 2025 | 1/3 | UCMR-5 |
| PFBS | 0.0033 µg/L No EPA limit set Main supplier: RALEIGH, CITY OF · 650,000 people · 2024
Highest in the ZIP: 0.0045 µg/L — JOHNSTON CO-WEST · 99,027 people · 2025 | 3/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: RALEIGH, CITY OF · 650,000 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 27520
| Supplier | State | Population served |
|---|---|---|
| RALEIGH, CITY OF | NC | 650,000 |
| JOHNSTON CO-WEST | NC | 99,027 |
| CLAYTON, TOWN OF | NC | 30,876 |
Frequently asked questions about ZIP 27520 tap water
Is the tap water in ZIP 27520 safe to drink?
EPA testing detected 30 contaminants across the water suppliers serving ZIP 27520. 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 27520?
3 public water suppliers report EPA drinking-water monitoring for ZIP 27520. Each is listed above with its population served.
What contaminants are in ZIP 27520's water?
EPA monitoring detected Fluoride, Copper, TTHM, Total Haloacetic Acids (HAA5), Lead, and others across this ZIP's suppliers. The full list with levels and sources is above.