Interstate Dump-Station Corridor Guide

Gear note: our Black Tank Tech Support tee and the rest of the black tank shirts are made for dump station days.

Interstate dump stations are a travel tool, not a guarantee. Plenty of rest areas have restrooms and truck parking. Far fewer have a working RV dump.

This guide maps the corridors snowbirds and weekenders use most, plus the etiquette that keeps free dumps open. Treat every listing as a planning hint, then confirm the plaque and the hose bay when you arrive.

Why Dump Corridors Matter

Full-hookup nights are easy. Dry nights and long tow days are not. When tanks climb, you want a legal dump on the route you are already driving.

State rest areas are uneven. Private parks and truck-stop dumps fill the gaps, often for a fee. Plan the next two legal options, not just the next picnic exit.

I-10: Southwest to the Gulf

September 2026 rest-area directories list about 92 I-10 stops from California to Florida. Only nine show an RV dump. The corridor is strong for travel, but dumps are clustered.

Texas holds several of the best-known free dumps:

• Sutton County Rest Area near mile 394, eastbound and westbound, with pet areas and an RV dump listed
• Kerr County Rest Area near mile 514 (Kerrville area), eastbound and westbound, with pet areas, vending, and an RV dump listed

Camper notes on Kerr County often mention a free dump with water and a hilltop rest area. Big coaches should pull through carefully.

Farther east, Gulf Coast dumps show up again at:

• Slidell Rest Area and Visitor Center in Louisiana (westbound listing includes an RV dump)
• Mississippi rest areas near mile 63 (both directions) and the Jackson County Welcome Center
• Grand Bay Welcome Center in Alabama (eastbound listing includes an RV dump)

Arizona, New Mexico, and Florida I-10 rest areas in the same September 2026 tally mostly list pets and vending, not dumps. Plan private park or truck-stop options on those stretches.

I-40: Oklahoma and the Southern Plains

I-40 is a classic snowbird and cross-country tow route. Public dump coverage is thinner than the Texas I-10 pair, so Oklahoma stops punch above their weight when they work.

Traveler reports for the Sallisaw Rest Area on I-40 westbound describe a free dump near the exit with a rinse connection. Follow the cars-and-RV fork, not the truck-only side, or you can miss the dump lane.

Overnight rules and water labels change. Read the signs. If the bay is closed, use the opposite direction or a private park, not the shoulder.

I-75: Georgia Snowbird Legs

Florida-bound traffic on I-75 leans on Georgia rest areas for free dumps when they are open. Two stops show up again and again in camper reports:

• Lenox Rest Area southbound: dump on the way back to the interstate, often described as free and spacious
• Juliette Rest Area southbound near exit 179: separate RV parking, dump on the way out, mixed notes on overnight parking (believe the posted sign)

Status changes. Some visits find a clean free bay. Others find a clogged inlet. Keep a primary dump and a paid backup on the map.

Dump Etiquette That Keeps Stations Open

Free dumps close when people treat them badly. Stick to the designated bay. Wear gloves and keep a dedicated dump hose. Dump black first, then gray. Rinse the inlet. Cap up and move on. Prep before you block the bay.

If overnight parking is banned, dump and go. Courtesy keeps these stations open.

Gray and Black Sequencing on Travel Days

Leave with enough tank room to reach the next known dump. Trust days of use more than imperfect sensors. Dump black first, then gray. Use a drinking-water hose only on labeled potable taps. Many rinse poles are non-potable.

If you need a fresh sewer hose or heavy gloves before a corridor week, stick with gear you already trust.

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How to Build a Dump Plan Before You Roll

1. Mark two legal dumps each travel day: a preferred stop plus a paid backup.
2. Check directionality. Some dumps exist on only one side of the interstate.
3. Read live notes the week you drive. Directories lag behind closures.
4. Carry the basics. Gloves, a clear elbow, enough hose, and a rinse plan.
5. Pair the stop with errands. Note a grocery or pharmacy exit so the dump day is a full reset.

The Bottom Line

Interstate dumps are useful and uneven. On I-10, only a handful of about 92 rest areas list an RV dump, many of them in Texas and along the Gulf. On I-40 and I-75, Sallisaw, Lenox, and Juliette show up in traveler reports, but status changes.

Plan the corridor, dump black then gray, leave the bay clean, and keep a paid backup on the map.

Sources

• Find Rest Areas: Interstate 10 directory (September 2026 amenity tally)
• Campendium traveler notes for Kerr County, Sallisaw, Lenox, and Juliette dump access
• State DOT and rest-area entrance signs for hours, overnight rules, and closures