Recreational Vehicle Dumping Stations

Chelmsford Water Pollution Control Plant 

265 Laurette Street, Chelmsford

  • The construction is done at Chelmsford Plant so the plant will be open for on-peak season from May 21, 2019 to October 15, 2019. 
  • Off-peak season is from October 16, 2019 to May 15, 2020.

Sudbury Wastewater Treatment Plant

1271 Kelly Lake Rd., Sudbury

  • Open 24/7 all year long.

Valley East Treatment Plant

9999 Yorkshire Drive, Val Caron


Hours of Operation

On-peak season (May 21 to October 15)

Sundays:  Noon to 7:30 p.m.

Mondays to Thursdays:  8 a.m. to 7:30 p.m.

Fridays: 8 a.m. to 3 p.m.

Closed on Saturdays and on statutory holiday weekends (Saturday, Sunday, Monday).

No appointment necessary.

Off-peak season (October 16, 2019 to May 15, 2020)

Monday to Friday: 7:30 a.m. and 3 p.m., weather dependent.

During the off-peak season an appointment is required. Please call 705-674-4455 extension 4822 to make an appointment.

Safety Tips

  • If you have any issues please call 311 and ask to speak to the Wastewater Overall Responsible Operator (ORO).
  • Only exit your vehicle if you are dumping the recreational vehicle (RV) tank. You must monitor the tank dump the entire time it is emptying.
  • Non-drinkable flushing water is provided as weather permits. During cold weather the water is turned off.
  • Please ensure only toilet and sink/shower waste is dumped into the wastewater system. A minimal amount of toilet waste deodorizer is allowed.
  • Never dump items harmful to the wastewater treatment process such as toxic chemicals, fats/oils and greases, flushable wipes or other debris not considered human waste.

Your cooperation in protecting our plant and the environment is appreciated!