What was found in Smithfield'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.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 537 µg/L 13% of the EPA limit 4000 µg/L Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019
Highest in the city: 888 µg/L — SMITHFIELD, TOWN OF · 12,900 people · 2019 | 2/3 | SYR4 |
| Chlorite | 710.5 µg/L 71% of the EPA limit 1000 µg/L Highest in the city: SMITHFIELD, TOWN OF · 12,900 people · 2019 | 1/3 | SYR4 |
| Copper | 435 µg/L 33% of the EPA limit 1300 µg/L Main supplier: JOHNSTON CO-EAST · 25,212 people · 2017 | 3/3 | SYR4 |
| TTHM | 84 µg/L 105% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019
Highest in the city: 97 µg/L — SMITHFIELD SOUTH WATER DIST · 803 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 40.6 µg/L 68% of the EPA limit 60 µg/L Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019
Highest in the city: 69.91 µg/L — SMITHFIELD, TOWN OF · 12,900 people · 2019 | 3/3 | SYR4 |
| Chloroform | 68.4 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 18 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019
Highest in the city: 40.42 µg/L — SMITHFIELD, TOWN OF · 12,900 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 23.15 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019
Highest in the city: 23.775 µg/L — SMITHFIELD, TOWN OF · 12,900 people · 2019 | 3/3 | SYR4 |
| Lead | 23 µg/L 153% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: JOHNSTON CO-EAST · 25,212 people · 2017 | 3/3 | SYR4 |
| Bromodichloromethane | 20 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019
Highest in the city: 22.4 µg/L — SMITHFIELD SOUTH WATER DIST · 803 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 10.5 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019 | 1/3 | SYR4 |
| Dibromochloromethane | 7.2 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019
Highest in the city: 8.42 µg/L — SMITHFIELD SOUTH WATER DIST · 803 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 6.55 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 5.85 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019 | 3/3 | SYR4 |
| Bromoform | 1.8 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019 | 2/3 | SYR4 |
| Simazine | 0.3510 µg/L 8.8% of the EPA limit 4 µg/L Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019
Highest in the city: 1.758 µg/L — SMITHFIELD, TOWN OF · 12,900 people · 2019 | 2/3 | SYR4 |
| Xylenes, Total | 0.7000 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: SMITHFIELD, TOWN OF · 12,900 people · 2019 | 1/3 | SYR4 |
| Atrazine | 0.1300 µg/L 4.3% of the EPA limit 3 µg/L Main supplier: JOHNSTON CO-EAST · 25,212 people · 2019
Highest in the city: 0.1580 µg/L — SMITHFIELD, TOWN OF · 12,900 people · 2019 | 2/3 | SYR4 |
| Pfba | 0.0144 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2024 | 2/3 | UCMR-5 |
| PFOS | 0.0097 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2024 | 2/3 | UCMR-5 |
| Pfhxa | 0.0082 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2024 | 2/3 | UCMR-5 |
| Pfpea | 0.0078 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2024 | 2/3 | UCMR-5 |
| PFOA | 0.0077 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2024 | 2/3 | UCMR-5 |
| PFBS | 0.0055 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2024 | 2/3 | UCMR-5 |
| PFHXS | 0.0038 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2024 | 1/3 | UCMR-5 |
| Pfhpa | 0.0033 µg/L No EPA limit set Main supplier: JOHNSTON CO-EAST · 25,212 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: JOHNSTON CO-EAST · 25,212 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.
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 Smithfield
| Supplier | Population served |
|---|---|
| JOHNSTON CO-EAST | 25,212 |
| SMITHFIELD, TOWN OF | 12,900 |
| SMITHFIELD SOUTH WATER DIST | 803 |
Frequently asked questions about Smithfield tap water
Is Smithfield tap water safe to drink?
EPA testing detected 27 contaminants in the water serving Smithfield. 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 Smithfield?
3 public water suppliers report drinking-water monitoring for Smithfield, North Carolina to the EPA. Each is listed above with its population served.
What contaminants are in Smithfield's water?
The contaminants EPA monitoring detected in Smithfield include Fluoride, Chlorite, Copper, TTHM, Total Haloacetic Acids (HAA5). 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.