What was found in Grand Canyon'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 |
|---|---|---|---|
| Copper | 920 µg/L 71% of the EPA limit 1300 µg/L Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2019 | 1/1 | SYR4 |
| Nitrate | 190 µg/L 1.9% of the EPA limit 10000 µg/L Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 160 µg/L 1.6% of the EPA limit 10000 µg/L Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2012 | 1/1 | SYR4 |
| Chloroform | 123.8 µg/L No EPA limit set Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2019 | 1/1 | SYR4 |
| TTHM | 116.325 µg/L 145% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2019 | 1/1 | SYR4 |
| Barium | 100 µg/L 5% of the EPA limit 2000 µg/L Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2018 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 90.975 µg/L 152% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 80.9 µg/L No EPA limit set Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2019 | 1/1 | SYR4 |
| Fluoride | 52 µg/L 1.3% of the EPA limit 4000 µg/L Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2018 | 1/1 | SYR4 |
| Dichloroacetic Acid | 38.72 µg/L No EPA limit set Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2019 | 1/1 | SYR4 |
| Lead | 12.7 µg/L 85% of the EPA limit 15 µg/L Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 8.02 µg/L No EPA limit set Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 5.66 µg/L No EPA limit set Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 2.31 µg/L No EPA limit set Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2019 | 1/1 | SYR4 |
| Chromium | 1.4 µg/L 1.4% of the EPA limit 100 µg/L Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2018 | 1/1 | SYR4 |
| Arsenic | 1.1 µg/L 11% of the EPA limit 10 µg/L Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2018 | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: GRAND CANYON NATIONAL PARK · 16,590 people · 2025 | 1/1 | LCR |
Water suppliers serving Grand Canyon
| Supplier | Population served |
|---|---|
| GRAND CANYON NATIONAL PARK | 16,590 |
Frequently asked questions about Grand Canyon tap water
Is Grand Canyon tap water safe to drink?
EPA testing detected 17 contaminants in the water serving Grand Canyon. 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 Grand Canyon?
1 public water supplier report drinking-water monitoring for Grand Canyon, Arizona to the EPA. Each is listed above with its population served.
What contaminants are in Grand Canyon's water?
The contaminants EPA monitoring detected in Grand Canyon include Copper, Nitrate, Nitrate-Nitrite, Chloroform, TTHM. 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.