What was found in Darlington'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 | 1200 µg/L 12% of the EPA limit 10000 µg/L Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019 | 1/2 | SYR4 |
| Fluoride | 1031 µg/L 26% of the EPA limit 4000 µg/L Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2018
Highest in the city: 1046 µg/L — DARLINGTON CITY OF (SC1610001) · 7,142 people · 2017 | 2/2 | SYR4 |
| Copper | 247.5 µg/L 19% of the EPA limit 1300 µg/L Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2017 | 2/2 | SYR4 |
| Nitrate-Nitrite | 200 µg/L 2% of the EPA limit 10000 µg/L Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 29.723 µg/L No EPA limit set Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 29.432 µg/L 49% of the EPA limit 60 µg/L Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019 | 2/2 | SYR4 |
| Lithium | 25.6 µg/L No EPA limit set Highest in the city: DARLINGTON CITY OF (SC1610001) · 7,142 people · 2023 | 1/2 | UCMR-5 |
| Lead | 7.33 µg/L 49% of the EPA limit 15 µg/L Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2017 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.625 pCi/L 31% of the EPA limit 15 pCi/L Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2018 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 2.804 pCi/L 56% of the EPA limit 5 pCi/L Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019 | 2/2 | SYR4 |
| TTHM | 2.6585 µg/L 3.3% of the EPA limit 80 µg/L Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019 | 1/2 | SYR4 |
| Chloroform | 2.384 µg/L No EPA limit set Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 1.504 µg/L No EPA limit set Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 1.401 µg/L No EPA limit set Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 1.37 µg/L No EPA limit set Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019
Highest in the city: 1.39 µg/L — DARLINGTON CITY OF (SC1610001) · 7,142 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 1.36178 µg/L No EPA limit set Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019
Highest in the city: 1.37231 µg/L — DARLINGTON CITY OF (SC1610001) · 7,142 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 1.25 µg/L No EPA limit set Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019 | 1/2 | SYR4 |
| Thallium, Total | 0.6700 µg/L 34% of the EPA limit 2 µg/L Highest in the city: DARLINGTON CITY OF (SC1610001) · 7,142 people · 2017 | 1/2 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0342 µg/L 17% of the EPA limit 0.2000 µg/L Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019 | 1/2 | SYR4 |
| Ethylene Dibromide | 0.0220 µg/L 44% of the EPA limit 0.0500 µg/L Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0016 mg/L 11% of the EPA limit 0.0150 mg/L Main supplier: DARLINGTON COUNTY W&SA (SC1620001) · 52,288 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 Darlington
| Supplier | Population served |
|---|---|
| DARLINGTON COUNTY W&SA (SC1620001) | 52,288 |
| DARLINGTON CITY OF (SC1610001) | 7,142 |
Frequently asked questions about Darlington tap water
Is Darlington tap water safe to drink?
EPA testing detected 21 contaminants in the water serving Darlington. 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 Darlington?
2 public water suppliers report drinking-water monitoring for Darlington, South Carolina to the EPA. Each is listed above with its population served.
What contaminants are in Darlington's water?
The contaminants EPA monitoring detected in Darlington include Nitrate, Fluoride, Copper, Nitrate-Nitrite, Dichloroacetic Acid. 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.