Air or sputtering in well lines usually means the pump is pulling air. The water level may have dropped near the pump, a pipe or fitting may be leaking, or a jet pump may be losing suction. A short burst after an outage or repair is normal. Ongoing sputtering needs a licensed installer.
Updated October 2026
Safety first: well pumps run on 230/240-volt circuits. Don’t open the pressure switch, control box or well cap wiring.
Normal or not?
- Usually normal: a burst of air after a power outage or pump work that clears in a few minutes.
- Usually harmless: milky water that clears from the bottom of a glass up. That is tiny air bubbles.
- Worth a look: sputtering after heavy use, like watering or laundry, or every time you open a tap.
Why is my well spitting air?
| Likely cause | What you can safely check | Needs a licensed pro? |
|---|---|---|
| Water level drawn down near the pump | Sputters after heavy use; fine after a rest | Yes, to check yield and pump depth |
| Leak in the pipe inside the well | Sputters every time; pump runs long | Yes |
| Jet pump losing suction | Pump sits in the basement or pump house | Yes |
| Failing check valve | Gauge drops with all taps closed | Yes |
| Air after an outage or repair | Clears within minutes | No |
What to do now
- Spread out heavy water use for a few days and see if the sputtering stops.
- Note when it happens: first draw of the morning, after laundry, or all day.
- If the pump runs but water stops, turn the breaker off to protect it.
Valley wells often have water close to the surface. In the Towns of Spring Green and Arena, the median water level sits about 12 to 20 feet down (medians from DNR well records). Knowing your well’s depth and water level helps an installer judge whether the pump is set at the right depth.
When you need a licensed professional
- Sputtering keeps coming back or gets worse.
- Pressure drops while no water is in use.
- The pump may need to be set deeper, or the well checked for yield.
Wisconsin rules require a DNR-licensed pump installer for pump and pressure-tank work on a drinking-water well; check with DNR if you’re unsure.
