What was found in Granite Shoals'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 | 410 µg/L 4.1% of the EPA limit 10000 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019
Highest in the city: 7726 µg/L — CITY OF GRANITE SHOALS SHERWOOD III · 675 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 4380 µg/L 44% of the EPA limit 10000 µg/L Highest in the city: CITY OF GRANITE SHOALS SHERWOOD III · 675 people · 2015 | 1/2 | SYR4 |
| Fluoride | 246.5 µg/L 6.2% of the EPA limit 4000 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019
Highest in the city: 860 µg/L — CITY OF GRANITE SHOALS SHERWOOD III · 675 people · 2018 | 2/2 | SYR4 |
| Copper | 247.5 µg/L 19% of the EPA limit 1300 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019
Highest in the city: 264 µg/L — CITY OF GRANITE SHOALS SHERWOOD III · 675 people · 2018 | 2/2 | SYR4 |
| Cyanide | 197.5 µg/L 99% of the EPA limit 200 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2018 | 1/2 | SYR4 |
| TTHM | 176.5 µg/L 221% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 140.8 µg/L 235% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 2/2 | SYR4 |
| Chloroform | 95.475 µg/L No EPA limit set Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 2/2 | SYR4 |
| Barium | 76.06 µg/L 3.8% of the EPA limit 2000 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 70.82 µg/L No EPA limit set Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 62.15 µg/L No EPA limit set Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 47.1 µg/L No EPA limit set Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 25.455 µg/L No EPA limit set Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 2/2 | SYR4 |
| Lead | 15.903 µg/L 106% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 2/2 | SYR4 |
| Lithium | 11.3 µg/L No EPA limit set Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2024 | 1/2 | UCMR-5 |
| Monochloroacetic Acid | 10.205 µg/L No EPA limit set Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 7.64 µg/L No EPA limit set Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 2/2 | SYR4 |
| Combined Uranium | 5.7 µg/L 19% of the EPA limit 30 µg/L Highest in the city: CITY OF GRANITE SHOALS SHERWOOD III · 675 people · 2018 | 1/2 | SYR4 |
| Monobromoacetic Acid | 5.23 µg/L No EPA limit set Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 1/2 | SYR4 |
| Gross Beta Particle Activity | 5 pCi/L No EPA limit set Highest in the city: CITY OF GRANITE SHOALS SHERWOOD III · 675 people · 2018 | 1/2 | SYR4 |
| Selenium | 4.93 µg/L 9.9% of the EPA limit 50 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 1/2 | SYR4 |
| Bromoform | 4.565 µg/L No EPA limit set Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 2/2 | SYR4 |
| Dalapon | 4.14 µg/L 2.1% of the EPA limit 200 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4 pCi/L 27% of the EPA limit 15 pCi/L Highest in the city: CITY OF GRANITE SHOALS SHERWOOD III · 675 people · 2018 | 1/2 | SYR4 |
| Chromium | 3.37 µg/L 3.4% of the EPA limit 100 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 1/2 | SYR4 |
| Arsenic | 2.09 µg/L 21% of the EPA limit 10 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 1/2 | SYR4 |
| Xylenes, Total | 2 µg/L 0% of the EPA limit 10000 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 1/2 | SYR4 |
| Toluene | 0.6700 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 1/2 | SYR4 |
| Thallium, Total | 0.3460 µg/L 17% of the EPA limit 2 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 1/2 | SYR4 |
| Atrazine | 0.1400 µg/L 4.7% of the EPA limit 3 µg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2019 | 1/2 | SYR4 |
| Pfba | 0.0167 µg/L No EPA limit set Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2024 | 1/2 | UCMR-5 |
| Lead | 0.0014 mg/L 9.5% of the EPA limit 0.0150 mg/L Main supplier: CITY OF GRANITE SHOALS · 6,795 people · 2024
Highest in the city: 0.0059 mg/L — CITY OF GRANITE SHOALS SHERWOOD III · 675 people · 2025 | 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 Granite Shoals
| Supplier | Population served |
|---|---|
| CITY OF GRANITE SHOALS | 6,795 |
| CITY OF GRANITE SHOALS SHERWOOD III | 675 |
Frequently asked questions about Granite Shoals tap water
Is Granite Shoals tap water safe to drink?
EPA testing detected 32 contaminants in the water serving Granite Shoals. 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 Granite Shoals?
2 public water suppliers report drinking-water monitoring for Granite Shoals, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Granite Shoals's water?
The contaminants EPA monitoring detected in Granite Shoals include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Cyanide. 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.