What was found in Newark'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 |
|---|---|---|---|
| Nitrate-Nitrite | 3416.5 µg/L 34% of the EPA limit 10000 µg/L Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 3/5 | SYR4 |
| Nitrate | 3416.5 µg/L 34% of the EPA limit 10000 µg/L Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 4/5 | SYR4 |
| Fluoride | 978 µg/L 24% of the EPA limit 4000 µg/L Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 3/5 | SYR4 |
| Copper | 77.8 µg/L 6% of the EPA limit 1300 µg/L Main supplier: NEWARK CITY PWS · 49,934 people · 2017
Highest in the city: 177.6 µg/L — COUNTRY HILLS MHP · 48 people · 2018 | 5/5 | SYR4 |
| Barium | 10.58 µg/L 0.5% of the EPA limit 2000 µg/L Main supplier: NEWARK CITY PWS · 49,934 people · 2019
Highest in the city: 128.8 µg/L — ST LOUISVILLE VILLAGE PWS · 374 people · 2018 | 3/5 | SYR4 |
| TTHM | 94.0265 µg/L 118% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 4/5 | SYR4 |
| Chloroform | 78.04 µg/L No EPA limit set Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 4/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 47.8575 µg/L 80% of the EPA limit 60 µg/L Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 2/5 | SYR4 |
| Lead | 37.8 µg/L 252% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: NEWARK CITY PWS · 49,934 people · 2017 | 3/5 | SYR4 |
| Dichloroacetic Acid | 31.044 µg/L No EPA limit set Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 3/5 | SYR4 |
| Trichloroacetic Acid | 15.601 µg/L No EPA limit set Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 2/5 | SYR4 |
| Bromodichloromethane | 14.764 µg/L No EPA limit set Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 4/5 | SYR4 |
| Nitrite | 10 µg/L 1% of the EPA limit 1000 µg/L Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 1/5 | SYR4 |
| Monochloroacetic Acid | 8.6521 µg/L No EPA limit set Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 1/5 | SYR4 |
| Dibromochloromethane | 8.263 µg/L No EPA limit set Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 4/5 | SYR4 |
| Atrazine | 3.773 µg/L 126% of the EPA limit, at the 95th percentile of samples — 3 µg/L Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 1/5 | SYR4 |
| Dibromoacetic Acid | 3.36605 µg/L No EPA limit set Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 2/5 | SYR4 |
| Bromoform | 3.261 µg/L No EPA limit set Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 4/5 | SYR4 |
| Arsenic | 3 µg/L 30% of the EPA limit 10 µg/L Highest in the city: ST LOUISVILLE VILLAGE PWS · 374 people · 2018 | 1/5 | SYR4 |
| Monobromoacetic Acid | 2.521 µg/L No EPA limit set Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 1/5 | SYR4 |
| Simazine | 1.394 µg/L 35% of the EPA limit 4 µg/L Main supplier: NEWARK CITY PWS · 49,934 people · 2019 | 1/5 | SYR4 |
| Pfba | 0.0095 µg/L No EPA limit set Main supplier: NEWARK CITY PWS · 49,934 people · 2023 | 1/5 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: NEWARK CITY PWS · 49,934 people · 2023
Highest in the city: 0.0048 mg/L — ST LOUISVILLE VILLAGE PWS · 374 people · 2024 | 5/5 | 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 Newark
| Supplier | Population served |
|---|---|
| NEWARK CITY PWS | 49,934 |
| ST LOUISVILLE VILLAGE PWS | 374 |
| WILKINS MOBILE HOME PARK | 115 |
| WINDING CREEK ESTATES | 57 |
| COUNTRY HILLS MHP | 48 |
Frequently asked questions about Newark tap water
Is Newark tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Newark. 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 Newark?
5 public water suppliers report drinking-water monitoring for Newark, Ohio to the EPA. Each is listed above with its population served.
What contaminants are in Newark's water?
The contaminants EPA monitoring detected in Newark include Nitrate-Nitrite, Nitrate, Fluoride, Copper, Barium. 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.