Benson County, ND
These figures come from wells tested in Benson County, ND, not from any one well.
- Iron is common in wells in Benson County, ND (25 of 86 tested wells were over that level), so it's worth testing for.
- Manganese is common in wells in Benson County, ND (59 of 86 tested wells were over that level), so it's worth testing for.
- Sulfate is common in wells in Benson County, ND (125 of 445 tested wells were over that level), so it's worth testing for.
- Wells in Benson County, ND are typically very hard (446 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:
- iron (common in wells here)
- manganese (common in wells here)
- sulfate (common in wells here)
- 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. North Dakota'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 | 29% |
| Wells over the level / wells judged | 25 of 86 |
| Median | 0.028525 mg/L |
| Years sampled | 1921–2024 |
| Wells | 86 |
| Test results | 1,097 |
| Wells left out | 0 |
| Sources | SPIRITLK (264), USGS (162), USGS-ND (11) |
Manganese Recent
| Level it's compared with | 0.05 mg/L |
|---|---|
| Share of wells over the level | 69% |
| Wells over the level / wells judged | 59 of 86 |
| Median | 0.265 mg/L |
| Years sampled | 1960–2024 |
| Wells | 86 |
| Test results | 944 |
| Wells left out | 0 |
| Sources | SPIRITLK (244), USGS (61), USGS-ND (3) |
Hardness Recent
| Level it's compared with | none; hardness is shown in bands |
|---|---|
| Share of wells very hard | 87% |
| Median | 270 mg/L as CaCO₃ |
| Years sampled | 1921–2024 |
| Wells | 446 |
| Test results | 1,107 |
| Wells left out | 0 |
| Sources | SPIRITLK (270), USGS (164), USGS-ND (12) |
Sulfate Recent
| Level it's compared with | 250 mg/L |
|---|---|
| Share of wells over the level | 28% |
| Wells over the level / wells judged | 125 of 445 |
| Median | 71 mg/L |
| Years sampled | 1921–2024 |
| Wells | 445 |
| Test results | 1,099 |
| Wells left out | 0 |
| Sources | SPIRITLK (270), USGS (163), USGS-ND (12) |