What was found in Gilbert'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 | 4600 µg/L 46% of the EPA limit 10000 µg/L Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019
Highest in the city: 6900 µg/L — SIESTA COVE RV PARK MARINA (SC3270802) · 40 people · 2019 | 3/4 | SYR4 |
| Nitrate-Nitrite | 2690 µg/L 27% of the EPA limit 10000 µg/L Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2016 | 3/4 | SYR4 |
| Fluoride | 1180 µg/L 30% of the EPA limit 4000 µg/L Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2017 | 2/4 | SYR4 |
| Copper | 918.05 µg/L 71% of the EPA limit 1300 µg/L Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019 | 4/4 | SYR4 |
| Barium | 154.95 µg/L 7.7% of the EPA limit 2000 µg/L Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2017 | 2/4 | SYR4 |
| Lithium | 49.4 µg/L No EPA limit set Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2024 | 1/4 | UCMR-5 |
| TTHM | 10.43 µg/L 13% of the EPA limit 80 µg/L Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019
Highest in the city: 33.269 µg/L — LAKESIDE FOREST 2 (SC3250030) · 43 people · 2019 | 2/4 | SYR4 |
| Chloroform | 4.25836 µg/L No EPA limit set Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019
Highest in the city: 23.492 µg/L — LAKESIDE FOREST 2 (SC3250030) · 43 people · 2019 | 2/4 | SYR4 |
| Combined Uranium | 11.7 µg/L 39% of the EPA limit 30 µg/L Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2016
Highest in the city: 22.1384 µg/L — SIESTA COVE RV PARK MARINA (SC3270802) · 40 people · 2019 | 2/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 9.615 pCi/L 64% of the EPA limit 15 pCi/L Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2018
Highest in the city: 21.17 pCi/L — SIESTA COVE RV PARK MARINA (SC3270802) · 40 people · 2019 | 3/4 | SYR4 |
| Lead | 12.705 µg/L 85% of the EPA limit 15 µg/L Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019 | 4/4 | SYR4 |
| Gross Beta Particle Activity | 9.292 pCi/L No EPA limit set Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019
Highest in the city: 9.806 pCi/L — SIESTA COVE RV PARK MARINA (SC3270802) · 40 people · 2019 | 2/4 | SYR4 |
| Bromodichloromethane | 2.70807 µg/L No EPA limit set Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019
Highest in the city: 9.777 µg/L — LAKESIDE FOREST 2 (SC3250030) · 43 people · 2019 | 2/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 3.575 µg/L 6% of the EPA limit 60 µg/L Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019
Highest in the city: 8.823 µg/L — LAKESIDE FOREST 2 (SC3250030) · 43 people · 2019 | 2/4 | SYR4 |
| Combined Radium (-226 And -228) | 7.8 pCi/L 156% of the EPA limit, at the 95th percentile of samples — 5 pCi/L Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019 | 3/4 | SYR4 |
| Dichloroacetic Acid | 3.6985 µg/L No EPA limit set Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019
Highest in the city: 6.976 µg/L — LAKESIDE FOREST 2 (SC3250030) · 43 people · 2019 | 2/4 | SYR4 |
| Dibromochloromethane | 3.8175 µg/L No EPA limit set Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019 | 2/4 | SYR4 |
| Bromoform | 2.86 µg/L No EPA limit set Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019 | 1/4 | SYR4 |
| Dibromoacetic Acid | 2.3 µg/L No EPA limit set Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019 | 1/4 | SYR4 |
| Trichloroacetic Acid | 1 µg/L No EPA limit set Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2019
Highest in the city: 2.113 µg/L — LAKESIDE FOREST 2 (SC3250030) · 43 people · 2019 | 2/4 | SYR4 |
| Monobromoacetic Acid | 1.30252 µg/L No EPA limit set Highest in the city: LAKESIDE FOREST 2 (SC3250030) · 43 people · 2019 | 1/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.7800 µg/L 13% of the EPA limit 6 µg/L Highest in the city: SIESTA COVE RV PARK MARINA (SC3270802) · 40 people · 2018 | 1/4 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: GILBERT-SUMMIT WD (3220001) · 10,400 people · 2025
Highest in the city: 0.0100 mg/L — SIESTA COVE RV PARK MARINA (SC3270802) · 40 people · 2025 | 4/4 | 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 Gilbert
| Supplier | Population served |
|---|---|
| GILBERT-SUMMIT WD (3220001) | 10,400 |
| MURRAY HILL ESTATES (SC3250014) | 134 |
| LAKESIDE FOREST 2 (SC3250030) | 43 |
| SIESTA COVE RV PARK MARINA (SC3270802) | 40 |
Frequently asked questions about Gilbert tap water
Is Gilbert tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Gilbert. 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 Gilbert?
4 public water suppliers report drinking-water monitoring for Gilbert, South Carolina to the EPA. Each is listed above with its population served.
What contaminants are in Gilbert's water?
The contaminants EPA monitoring detected in Gilbert include Nitrate, Nitrate-Nitrite, 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.