What was found in Green Valley'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 | 8700 µg/L 87% of the EPA limit 10000 µg/L | 8/8 | SYR4 |
| Nitrate-Nitrite | 5400 µg/L 54% of the EPA limit 10000 µg/L | 7/8 | SYR4 |
| Fluoride | 1800 µg/L 45% of the EPA limit 4000 µg/L | 8/8 | SYR4 |
| Copper | 640 µg/L 49% of the EPA limit 1300 µg/L | 8/8 | SYR4 |
| Lithium | 166 µg/L No EPA limit set | 5/8 | UCMR-5 |
| Lead | 128 µg/L 853% of the EPA limit, in the worst sample — 15 µg/L | 8/8 | SYR4 |
| Barium | 76 µg/L 3.8% of the EPA limit 2000 µg/L | 8/8 | SYR4 |
| TTHM | 30.9 µg/L 39% of the EPA limit 80 µg/L | 7/8 | SYR4 |
| Arsenic | 21.1 µg/L 211% of the EPA limit, in the worst sample — 10 µg/L | 8/8 | SYR4 |
| Combined Uranium | 18 µg/L 60% of the EPA limit 30 µg/L | 1/8 | SYR4 |
| Bromoform | 9.2 µg/L No EPA limit set | 3/8 | SYR4 |
| Dibromochloromethane | 6.8 µg/L No EPA limit set | 3/8 | SYR4 |
| Total Haloacetic Acids (HAA5) | 6.7 µg/L 11% of the EPA limit 60 µg/L | 4/8 | SYR4 |
| Selenium | 4.9 µg/L 9.8% of the EPA limit 50 µg/L | 1/8 | SYR4 |
| Bromodichloromethane | 3.1 µg/L No EPA limit set | 3/8 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3 pCi/L 20% of the EPA limit 15 pCi/L | 1/8 | SYR4 |
| Xylenes, Total | 2.8 µg/L 0% of the EPA limit 10000 µg/L | 3/8 | SYR4 |
| Dibromoacetic Acid | 2.5 µg/L No EPA limit set | 1/8 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 2 µg/L 33% of the EPA limit 6 µg/L | 2/8 | SYR4 |
| Chloroform | 1.2 µg/L No EPA limit set | 2/8 | SYR4 |
| Chromium | 1 µg/L 1% of the EPA limit 100 µg/L | 1/8 | SYR4 |
| Combined Radium (-226 And -228) | 1 pCi/L 20% of the EPA limit 5 pCi/L | 3/8 | SYR4 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L | 8/8 | LCR |
Water suppliers serving Green Valley
| Supplier | Population served |
|---|---|
| COMMUNITY WC OF GREEN VALLEY | 22,085 |
| GREEN VALLEY DWID | 8,687 |
| QUAIL CREEK WATER COMPANY | 6,812 |
| GW FARMERS WATER CO - CONTINENTAL | 5,592 |
| GW SAGUARO DIST WATER CO - LAS QUINTAS | 3,720 |
| GW FARMERS WATER CO - SAHUARITA | 492 |
| VALLE VERDE DEL NORTE | 300 |
| MOUNTAIN VIEW RV RANCH | 100 |
Frequently asked questions about Green Valley tap water
Is Green Valley tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Green Valley. 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 Green Valley?
8 public water suppliers report drinking-water monitoring for Green Valley, Arizona to the EPA. Each is listed above with its population served.
What contaminants are in Green Valley's water?
The contaminants EPA monitoring detected in Green Valley include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Lithium. 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.