What was found in Summerville's water
The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 10000 µg/L 100% of the EPA limit 10000 µg/L | 1/9 | SYR4 |
| Fluoride | 2400 µg/L 60% of the EPA limit 4000 µg/L | 2/9 | SYR4 |
| Copper | 260 µg/L 20% of the EPA limit 1300 µg/L | 4/9 | SYR4 |
| Nitrate-Nitrite | 78 µg/L 0.8% of the EPA limit 10000 µg/L | 1/9 | SYR4 |
| TTHM | 72.29 µg/L 90% of the EPA limit 80 µg/L | 4/9 | SYR4 |
| Total Haloacetic Acids (HAA5) | 69.72 µg/L 116% of the EPA limit, in the worst sample — 60 µg/L | 4/9 | SYR4 |
| Dichloroacetic Acid | 57.01 µg/L No EPA limit set | 4/9 | SYR4 |
| Dibromochloromethane | 29.88 µg/L No EPA limit set | 4/9 | SYR4 |
| Bromoform | 27.52 µg/L No EPA limit set | 2/9 | SYR4 |
| Gross Alpha, Excl. Radon And U | 27.2 pCi/L 181% of the EPA limit, in the worst sample — 15 pCi/L | 1/9 | SYR4 |
| Chloroform | 25.81 µg/L No EPA limit set | 4/9 | SYR4 |
| Bromodichloromethane | 15.59 µg/L No EPA limit set | 4/9 | SYR4 |
| Monobromoacetic Acid | 14.46 µg/L No EPA limit set | 4/9 | SYR4 |
| Trichloroacetic Acid | 13.74 µg/L No EPA limit set | 4/9 | SYR4 |
| Lithium | 12.7 µg/L No EPA limit set | 1/9 | UCMR-5 |
| Dibromoacetic Acid | 11.66 µg/L No EPA limit set | 4/9 | SYR4 |
| Lead | 9.7 µg/L 65% of the EPA limit 15 µg/L | 4/9 | SYR4 |
| Gross Beta Particle Activity | 6.34 pCi/L No EPA limit set | 1/9 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.4 µg/L 23% of the EPA limit 6 µg/L | 1/9 | SYR4 |
| Combined Radium (-226 And -228) | 1.2 pCi/L 24% of the EPA limit 5 pCi/L | 1/9 | SYR4 |
| PFOS | 0.0081 µg/L No EPA limit set | 3/9 | UCMR-5 |
| Pfpea | 0.0072 µg/L No EPA limit set | 3/9 | UCMR-5 |
| Pfba | 0.0070 µg/L No EPA limit set | 3/9 | UCMR-5 |
| PFOA | 0.0065 µg/L No EPA limit set | 3/9 | UCMR-5 |
| Hfpo-Da | 0.0062 µg/L No EPA limit set | 1/9 | UCMR-5 |
| Pfhxa | 0.0062 µg/L No EPA limit set | 3/9 | UCMR-5 |
| PFBS | 0.0046 µg/L No EPA limit set | 3/9 | UCMR-5 |
| Pfhpa | 0.0030 µg/L No EPA limit set | 1/9 | UCMR-5 |
| Lead | 0.00090 mg/L 6% of the EPA limit 0.0150 mg/L | 9/9 | LCR |
Water suppliers serving Summerville
| Supplier | Population served |
|---|---|
| SUMMERVILLE CPW (SC1810003) | 81,750 |
| DCWA KNIGHTSVILLE (SC1820001) | 40,141 |
| DCWS/CLAY FIELD DRIVE (SC1850014) | 1,648 |
| HOMECOMING SUBDIVISION (SC1850016) | 883 |
| DCWA CALOMET VALLEY (1850009) | 275 |
| HERON'S WALK PHASE 1 (SC1850017) | 231 |
| DCWS HIGHWAY 17A (SC1820009) | 200 |
| DCWS CALEB COURT (SC1850015) | 156 |
| SANDY RUN MHP (SC0860037) | 41 |
Frequently asked questions about Summerville tap water
Is Summerville tap water safe to drink?
EPA testing detected 29 contaminants in the water serving Summerville. 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 Summerville?
9 public water suppliers report drinking-water monitoring for Summerville, South Carolina to the EPA. Each is listed above with its population served.
What contaminants are in Summerville's water?
The contaminants EPA monitoring detected in Summerville include Nitrate, Fluoride, Copper, Nitrate-Nitrite, TTHM. The full list, with the highest level found 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.