Eddy County, ND
These figures come from wells tested in Eddy County, ND, not from any one well.
- Iron is common in wells in Eddy County, ND (9 of 25 tested wells were over that level), so it's worth testing for.
- Manganese is common in wells in Eddy County, ND (16 of 26 tested wells were over that level), so it's worth testing for.
- Sulfate is common in wells in Eddy County, ND (17 of 158 tested wells were over that level), so it's worth testing for.
- Wells in Eddy County, ND are typically very hard (161 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 | 36% |
| Wells over the level / wells judged | 9 of 25 |
| Median | 0.048 mg/L |
| Years sampled | 1961–2024 |
| Wells | 25 |
| Test results | 396 |
| Wells left out | 0 |
| Sources | USGS (90), SPIRITLK (63) |
Manganese Recent
| Level it's compared with | 0.05 mg/L |
|---|---|
| Share of wells over the level | 62% |
| Wells over the level / wells judged | 16 of 26 |
| Median | 0.169 mg/L |
| Years sampled | 1965–2024 |
| Wells | 26 |
| Test results | 374 |
| Wells left out | 0 |
| Sources | SPIRITLK (54), USGS (51) |
Hardness Recent
| Level it's compared with | none; hardness is shown in bands |
|---|---|
| Share of wells very hard | 88% |
| Median | 276 mg/L as CaCO₃ |
| Years sampled | 1956–2024 |
| Wells | 161 |
| Test results | 406 |
| Wells left out | 0 |
| Sources | USGS (93), SPIRITLK (64), USGS-ND (4) |
Sulfate Recent
| Level it's compared with | 250 mg/L |
|---|---|
| Share of wells over the level | 11% |
| Wells over the level / wells judged | 17 of 158 |
| Median | 58 mg/L |
| Years sampled | 1961–2024 |
| Wells | 158 |
| Test results | 390 |
| Wells left out | 0 |
| Sources | USGS (91), SPIRITLK (64), USGS-ND (3) |