Hazardous Materials

Drop-Off Information

Be sure to dispose of all hazardous materials properly. This includes cans of PAINT. The Public Works department has a Free drop-off program that allows residents to turn in small quantities of hazardous waste per household. All Hazardous materials must conform to the list of accepted items in order to be dropped off. Resident's must provide proof of residency in Castle Hills at the time of drop-off.

Business Hours:
Monday through Thursday
8a.m. - 12p.m and 1p.m. - 4p.m.
Friday 8a.m.-12p.m. (no drop off after 12p.m.)
Hazardous Waste Old cans
Drop Off Location during approved Business Hours Only:
Public Works Building
209 Lemonwood Drive

DO NOT DROP OFF MATERIALS AFTER HOURS, ON WEEKENDS, OR ON HOLIDAYS.
Hazardous materials are dangerous when left unattended!


If you are unable to drop off Hazardous Materials during business hours, please call Public Works (210) 342-2341 for a pickup. There is a nominal charge of $30 for Hazardous Materials pickup.

Items ACCEPTED for Drop-Off

Be sure to secure any product lids, and contain hazardous items in a box or plastic bag.

  • HOUSEHOLD PAINT (limit 10 one-gallon cans or 2 five-gallon pails)
  • PAINT THINNER (including stains and lacquer)
  • SPRAY PAINT (limit 10 cans)
  • CURLY or FLUORESCENT LIGHTS
  • ACID / CORROSIVES
  • CLEANSERS (drain, oven, tub & tile)
  • INSECTICIDES
  • MOTOR OIL (new or used)
  • OLD GASOLINE
  • BATTERIES (household only, NO car batteries)
  • FIRE EXTINGUISHERS
  • POOL CHEMICALS
  • PROPANE TANKS
  • FERTILIZER
How To Safely Dispose of Hazardous Materials:
  1. Keep the contents in the original container.
  2. Do not mix different hazardous materials into the same container (to avoid dangerous chemical reactions.)
  3. Transport materials for drop-off in the trunk or bed of vehicle.
  4. Do not pour hazardous materials on the ground, down the drain, or in storm sewers.
  5. DO NOT place any hazardous materials in garbage receptacles or recycle containers, as serious injury may occur to sanitation workers.

Items NOT Accepted for Drop-Off

These items CANNOT be accepted for drop-off. Contact a local recycling center for more information on how to safely dispose of these items.
  • NO Ammunition
  • NO Appliances (refrigerator, washer/dryer, microwave, etc.)
  • NO Brush
  • NO Car Batteries
  • NO Car Tires
  • NO Commercial Waste
  • NO Construction materials
  • NO Electronic Waste (computer, cell phone, TV)
  • NO Fireworks
  • NO Household Trash
  • NO Medical Waste
  • NO Recycling
DO NOT leave paint, chemicals, or other hazardous materials outside of City buildings after hours. Unsupervised hazardous waste is extremely dangerous as chemicals may cause severe injury or death. Illegal hazardous waste drop off is punishable by fine and/or jail time.