What was found in Green Valley'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 | 2460 µg/L 25% of the EPA limit 10000 µg/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2019
Highest in the city: 8700 µg/L — GW FARMERS WATER CO - CONTINENTAL · 5,592 people · 2019 | 8/8 | SYR4 |
| Nitrate-Nitrite | 2442.5 µg/L 24% of the EPA limit 10000 µg/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2019
Highest in the city: 5400 µg/L — GW FARMERS WATER CO - SAHUARITA · 492 people · 2012 | 7/8 | SYR4 |
| Fluoride | 1725 µg/L 43% of the EPA limit 4000 µg/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2019 | 8/8 | SYR4 |
| Copper | 126 µg/L 9.7% of the EPA limit 1300 µg/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2018
Highest in the city: 243.95 µg/L — VALLE VERDE DEL NORTE · 300 people · 2019 | 8/8 | SYR4 |
| Lithium | 166 µg/L No EPA limit set Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2024 | 5/8 | UCMR-5 |
| Barium | 20 µg/L 1% of the EPA limit 2000 µg/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2019
Highest in the city: 71.6 µg/L — QUAIL CREEK WATER COMPANY · 6,812 people · 2017 | 8/8 | SYR4 |
| Lead | 4.57 µg/L 30% of the EPA limit 15 µg/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2018
Highest in the city: 68.76 µg/L — QUAIL CREEK WATER COMPANY · 6,812 people · 2018 | 8/8 | SYR4 |
| TTHM | 9.605 µg/L 12% of the EPA limit 80 µg/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2019
Highest in the city: 29.775 µg/L — GREEN VALLEY DWID · 8,687 people · 2019 | 7/8 | SYR4 |
| Arsenic | 8.705 µg/L 87% of the EPA limit 10 µg/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2019
Highest in the city: 18.265 µg/L — VALLE VERDE DEL NORTE · 300 people · 2019 | 8/8 | SYR4 |
| Combined Uranium | 18 µg/L 60% of the EPA limit 30 µg/L Highest in the city: GW FARMERS WATER CO - SAHUARITA · 492 people · 2018 | 1/8 | SYR4 |
| Bromoform | 1.855 µg/L No EPA limit set Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2019
Highest in the city: 8.88 µg/L — GREEN VALLEY DWID · 8,687 people · 2019 | 3/8 | SYR4 |
| Dibromochloromethane | 1.765 µg/L No EPA limit set Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2019
Highest in the city: 6.62 µg/L — GREEN VALLEY DWID · 8,687 people · 2019 | 3/8 | SYR4 |
| Total Haloacetic Acids (HAA5) | 2.385 µg/L 4% of the EPA limit 60 µg/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2019
Highest in the city: 5.44 µg/L — GREEN VALLEY DWID · 8,687 people · 2019 | 4/8 | SYR4 |
| Selenium | 4.9 µg/L 9.8% of the EPA limit 50 µg/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2019 | 1/8 | SYR4 |
| Bromodichloromethane | 0.8850 µg/L No EPA limit set Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2019
Highest in the city: 3.02 µg/L — GREEN VALLEY DWID · 8,687 people · 2019 | 3/8 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3 pCi/L 20% of the EPA limit 15 pCi/L Highest in the city: GW FARMERS WATER CO - SAHUARITA · 492 people · 2018 | 1/8 | SYR4 |
| Xylenes, Total | 0.7000 µg/L 0% of the EPA limit 10000 µg/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2019
Highest in the city: 2.78 µg/L — GW FARMERS WATER CO - CONTINENTAL · 5,592 people · 2019 | 3/8 | SYR4 |
| Dibromoacetic Acid | 2.5 µg/L No EPA limit set Highest in the city: GREEN VALLEY DWID · 8,687 people · 2019 | 1/8 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.92 µg/L 32% of the EPA limit 6 µg/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2019 | 2/8 | SYR4 |
| Chloroform | 1.165 µg/L No EPA limit set Highest in the city: GREEN VALLEY DWID · 8,687 people · 2019 | 2/8 | SYR4 |
| Chromium | 1 µg/L 1% of the EPA limit 100 µg/L Highest in the city: VALLE VERDE DEL NORTE · 300 people · 2018 | 1/8 | SYR4 |
| Combined Radium (-226 And -228) | 0.4950 pCi/L 9.9% of the EPA limit 5 pCi/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2016
Highest in the city: 1 pCi/L — VALLE VERDE DEL NORTE · 300 people · 2019 | 3/8 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: COMMUNITY WC OF GREEN VALLEY · 22,085 people · 2024
Highest in the city: 0.0030 mg/L — MOUNTAIN VIEW RV RANCH · 100 people · 2024 | 8/8 | 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 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 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.