Millard County, UT
These figures come from wells tested in Millard County, UT, not from any one well.
- Sulfate is common in wells in Millard County, UT (92 of 300 tested wells were over that level), so it's worth testing for.
- Iron and manganese are not common in wells in Millard County, UT (2 of 66 and 4 of 70 tested wells were over). Only a test tells you about your own well.
- Wells in Millard County, UT are typically very hard (300 wells tested).
- Only a test of your own well tells you about your water.
What to test for
Start with the four this site covers:
- sulfate (common in wells here)
- iron
- manganese
- hardness
Most well owners also test for these. We point to the source and don't interpret the results.
- arsenic: occurs naturally in groundwater in many regions. USGS: arsenic and drinking water
- nitrate: common near farmland and septic systems. EPA: private drinking water wells
- total coliform bacteria: the standard yearly well check. EPA: private drinking water wells
- lead and copper: from household plumbing, especially when pH is below 6.5. EPA: lead in drinking water
- PFAS: several states run private-well sampling programs. EPA: PFAS
- a certified lab: states certify labs and some run their own private-well programs. Utah's certified-lab list (from your state drinking-water program)
The numbers
County figures describe the wells sampled there, not any one well. Exact counts, sample years and sources are below.
Iron Recent
| Level it's compared with | 0.3 mg/L |
|---|---|
| Share of wells over the level | 3.0% |
| Wells over the level / wells judged | 2 of 66 |
| Median | < DL mg/L |
| Years sampled | 1941–2021 |
| Wells | 71 |
| Test results | 660 |
| Wells left out | 26 |
| Sources | USGS (181), UTAHDWQ_WQX (39), UTAHGS (5) |
More than half the wells had results below the lab's detection limit, so the median is reported as below that limit.
Manganese Recent
| Level it's compared with | 0.05 mg/L |
|---|---|
| Share of wells over the level | 5.7% |
| Wells over the level / wells judged | 4 of 70 |
| Median | < 2 mg/L |
| Years sampled | 1952–2021 |
| Wells | 72 |
| Test results | 621 |
| Wells left out | 27 |
| Sources | USGS (171), UTAHDWQ_WQX (30), UTAHGS (6) |
More than half the wells had results below the lab's detection limit, so the median is reported as below that limit.
Hardness Recent
| Level it's compared with | none; hardness is shown in bands |
|---|---|
| Share of wells very hard | 71% |
| Median | 299.5 mg/L as CaCO₃ |
| Years sampled | 1923–2021 |
| Wells | 300 |
| Test results | 1,077 |
| Wells left out | 28 |
| Sources | USGS (251), UTAHDWQ_WQX (40), UTAHGS (9) |
Sulfate Recent
| Level it's compared with | 250 mg/L |
|---|---|
| Share of wells over the level | 31% |
| Wells over the level / wells judged | 92 of 300 |
| Median | 96.15 mg/L |
| Years sampled | 1923–2021 |
| Wells | 300 |
| Test results | 1,069 |
| Wells left out | 29 |
| Sources | USGS (251), UTAHDWQ_WQX (40), UTAHGS (9) |