Records are grouped by state, then sorted by name. Each comes from an official operator or public-agency source. This is not a complete list of every dump station in the country. Closed and unavailable stations stay listed with their notices.
Status as of October 3, 2026
Wisconsin · County or regional park
Seasonal caution: Open when the water is turned on, from about mid-April or May through September or late October. Confirm eligibility before driving there.
Not published
Fee not confirmed
Wisconsin · County or regional park
Summary record. Link opens the operator page.
Confirm eligibility before driving there.
Not published
Fee not confirmed
Dodgeville, WI · Campground
Summary record. Link opens the operator page.
Confirm eligibility before driving there.
Not published
Fee not confirmed
Wisconsin · Campground
Dump-specific hours: not confirmed.
$25
Non-guest dump fee
Waukesha, WI · Municipal facility
Dump-specific hours: see details.
No fee
Dump fee
Ontario, WI · State park
Seasonal caution: Dump stations may not be available from fall through spring (approximately October 1 through May 15). Dump-specific hours: not confirmed.
$10
Non-guest dump fee. Park vehicle sticker also required
Bagley, WI · State park
Seasonal caution: Dump stations may not be available from fall through spring (approximately October 1 through May 15). Dump-specific hours: not confirmed.
$10
Non-guest dump fee. Park vehicle sticker also required
Blanchardville, WI · State park
Seasonal caution: Dump stations may not be available from fall through spring (approximately October 1 through May 15). Dump-specific hours: not confirmed.
$10
Non-guest dump fee. Park vehicle sticker also required
Shoshoni, WY · State park
Seasonal caution: April through October until cold weather. Dump-specific hours: not confirmed.
Fee charged
Non-guest dump fee. Day-use fee
Cody, WY · State park
Outside the published season (May to September, weather permitting).
Not published
Fee not confirmed
Wyoming · Federal recreation area
No confirmed reopening date.
Not published
Fee not published.
Cheyenne, WY · Visitor center
Summary record. Link opens the operator page.
Confirm eligibility before driving there.
Not published
Not published by the operator.
Confirm eligibility before driving there.
Not published
Not published by the operator.
Near Wheatland, WY · Highway rest area
Summary record. Link opens the operator page.
Confirm eligibility before driving there.
Not published
Not published by the operator.
Wyoming · Campground
Summary record. Link opens the operator page.
Confirm eligibility before driving there.
Not published
A fee is charged; the amount is not published.
Glendo, WY · State park
Seasonal service: Open year-round; water at the station mid-May to Sep. 30. Confirm eligibility before driving there.
Not published
Fee not confirmed
Green River, WY · Municipal facility
Seasonal service: Year-round. Dump-specific hours: see details.
No fee
Dump fee
Guernsey, WY · State park
Seasonal closure from October 16, 2026 (April 15 through October 15). Confirm eligibility before driving there.
Not published
Fee not confirmed
Confirm eligibility before driving there.
Not published
Not published by the operator.
Moorcroft, WY · State park
Seasonal caution: Normally May 1 to September 30. Dump-specific hours: see details.
Fee charged
Non-guest dump fee. Daily use fee