What was found in Sahuarita'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 | 2000 µg/L 20% of the EPA limit 10000 µg/L Main supplier: SAHUARITA WATER COMPANY · 18,178 people · 2019
Highest in the city: 11250 µg/L — LAZY ACRES MHP · 75 people · 2019 | 10/10 | SYR4 |
| Nitrate-Nitrite | 1960 µg/L 20% of the EPA limit 10000 µg/L Main supplier: SAHUARITA WATER COMPANY · 18,178 people · 2019
Highest in the city: 7000 µg/L — LAZY ACRES MHP · 75 people · 2017 | 8/10 | SYR4 |
| Fluoride | 858 µg/L 21% of the EPA limit 4000 µg/L Main supplier: SAHUARITA WATER COMPANY · 18,178 people · 2019 | 9/10 | SYR4 |
| Copper | 42.75 µg/L 3.3% of the EPA limit 1300 µg/L Main supplier: SAHUARITA WATER COMPANY · 18,178 people · 2019
Highest in the city: 211.5 µg/L — GW FARMERS WATER CO - SANTA RITA SPRINGS · 3,990 people · 2019 | 10/10 | SYR4 |
| Lithium | 130 µg/L No EPA limit set Main supplier: SAHUARITA WATER COMPANY · 18,178 people · 2024 | 2/10 | UCMR-5 |
| Barium | 80.3 µg/L 4% of the EPA limit 2000 µg/L Highest in the city: GW FARMERS WATER CO - SAHUARITA HIGHLAND · 492 people · 2019 | 8/10 | SYR4 |
| TTHM | 7.488 µg/L 9.4% of the EPA limit 80 µg/L Main supplier: SAHUARITA WATER COMPANY · 18,178 people · 2019
Highest in the city: 32.42 µg/L — SHILOH WATER COMPANY · 309 people · 2018 | 6/10 | SYR4 |
| Arsenic | 9.3 µg/L 93% of the EPA limit 10 µg/L Main supplier: SAHUARITA WATER COMPANY · 18,178 people · 2019
Highest in the city: 9.37 µg/L — SHILOH WATER COMPANY · 309 people · 2019 | 9/10 | SYR4 |
| Total Haloacetic Acids (HAA5) | 9.2 µg/L 15% of the EPA limit 60 µg/L Highest in the city: GW FARMERS WATER CO - SANTA RITA SPRINGS · 3,990 people · 2019 | 3/10 | SYR4 |
| Lead | 3.58 µg/L 24% of the EPA limit 15 µg/L Main supplier: SAHUARITA WATER COMPANY · 18,178 people · 2019
Highest in the city: 7.77 µg/L — SHILOH WATER COMPANY · 309 people · 2019 | 10/10 | SYR4 |
| Combined Uranium | 2.7 µg/L 9% of the EPA limit 30 µg/L Main supplier: SAHUARITA WATER COMPANY · 18,178 people · 2016
Highest in the city: 7.255 µg/L — GW OCOTILLO WATER - SIERRITA FOOTHILLS · 84 people · 2013 | 2/10 | SYR4 |
| Chromium | 2.58 µg/L 2.6% of the EPA limit 100 µg/L Highest in the city: GW OCOTILLO WATER - SIERRITA FOOTHILLS · 84 people · 2019 | 3/10 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.575 µg/L 26% of the EPA limit 6 µg/L Highest in the city: GW FARMERS WATER CO - SANTA RITA SPRINGS · 3,990 people · 2019 | 1/10 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1 pCi/L 6.7% of the EPA limit 15 pCi/L Main supplier: SAHUARITA WATER COMPANY · 18,178 people · 2016
Highest in the city: 1.42 pCi/L — GW OCOTILLO WATER - SIERRITA FOOTHILLS · 84 people · 2013 | 2/10 | SYR4 |
| Combined Radium (-226 And -228) | 0.9000 pCi/L 18% of the EPA limit 5 pCi/L Highest in the city: GW OCOTILLO WATER - SIERRITA FOOTHILLS · 84 people · 2016 | 2/10 | SYR4 |
| Xylenes, Total | 0.5000 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: GW OCOTILLO WATER - SIERRITA FOOTHILLS · 84 people · 2017 | 1/10 | SYR4 |
| PFBS | 0.0058 µg/L No EPA limit set Highest in the city: GW FARMERS WATER CO - SANTA RITA SPRINGS · 3,990 people · 2024 | 1/10 | UCMR-5 |
| PFOS | 0.0050 µg/L No EPA limit set Highest in the city: GW FARMERS WATER CO - SANTA RITA SPRINGS · 3,990 people · 2024 | 1/10 | UCMR-5 |
| PFHXS | 0.0040 µg/L No EPA limit set Highest in the city: GW FARMERS WATER CO - SANTA RITA SPRINGS · 3,990 people · 2024 | 1/10 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: SAHUARITA WATER COMPANY · 18,178 people · 2025
Highest in the city: 0.00032 mg/L — SAHUARITA VILLAGE WATER COMPANY · 93 people · 2025 | 10/10 | 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 Sahuarita
| Supplier | Population served |
|---|---|
| SAHUARITA WATER COMPANY | 18,178 |
| GW FARMERS WATER CO - SANTA RITA SPRINGS | 3,990 |
| GW FARMERS WATER CO - SAHUARITA HIGHLAND | 492 |
| SHILOH WATER COMPANY | 309 |
| LOS ARBOLES MOBILE HOME PARK | 303 |
| MOBILE HOME PROPERTIES | 114 |
| SAHUARITA VILLAGE WATER COMPANY | 93 |
| GW OCOTILLO WATER - SIERRITA FOOTHILLS | 84 |
| LAZY ACRES MHP | 75 |
| SANTA RITA HEIGHTS MHP | 50 |
Frequently asked questions about Sahuarita tap water
Is Sahuarita tap water safe to drink?
EPA testing detected 20 contaminants in the water serving Sahuarita. 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 Sahuarita?
10 public water suppliers report drinking-water monitoring for Sahuarita, Arizona to the EPA. Each is listed above with its population served.
What contaminants are in Sahuarita's water?
The contaminants EPA monitoring detected in Sahuarita 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.