Skip to content

Safe Mercury Thermostat Disposal for California Contractors

Are you a professional contractor who deals with mercury thermostats?

Join over 75 California contractors that are helping to prevent mercury contamination by acting as collection partners for out of use mercury-containing thermostats. Here’s how:

Option 1:

As a Californian contractor, you are eligible for a free collection container. If you come across multiple mercury thermostats in your line of work, you should order a free collection container. Currently, 97 professional contractors in California have utilized our free collection containers to properly dispose of mercury thermostats! 

Steps to Collecting Mercury Thermostats:

  1. Submit a bin or pail request form to Thermostat Care team by completing a form and emailing it to
  2. Thermostat Care team processes the request and prepares to ship your bin or pail to your location.
  3. The requested bin or pail, along with related materials (like guidelines on how to properly package mercury thermostats and care for the bin or pail) will be sent to your location. Please note that the actual bin or pail will have TRC (Thermostat Recycling Corporation) branding, but this is still a part of the Thermostat Care program. If you do not receive your container within 1 month, please contact to inquire about the status of your container.
  4. Collect mercury thermostats! DO NOT remove the mercury ampule from the thermostat. Place the entire thermostat into an individual and sealable bag in the collection container. Broken thermostats will not be accepted at drop-off locations.
  5. When a mercury thermostat is dropped off in your container, record relevant information in the mercury collection log (included in our Universal Waste Regulation training material, which also comes with each new container sent to your location). This tracking log needs to be kept at your location and covers the collection records spanning three years.
  6. Once the container is full, or 1 year after receiving your first thermostat (whichever comes first), schedule a FedEx Ground pickup to return the container free of charge. Your container was shipped with the pre-paid label already inside. If you misplaced the label, contact for a replacement. To schedule: Visit the FedEx website section to “Schedule a Ground Return Package Pickup” ( or call FedEx customer service to schedule a pickup at 1 (800) 463-3339.
  7. When the FedEx carrier picks up your container, make sure you receive a shipping receipt from them, which will have information about the container contents. To follow Program expectations, you must keep a record at your location about the shipments for at least three years.
  8. Once a pickup order is received by our processing partner (Veolia), a replacement container will automatically be sent back. If you have any questions about the arrival of your replacement container or would like to order a small pail to have on-hand for mercury thermostat collection while your container is being processed, please contact

Option 2:

Thermostat Care establishes qualified mercury thermostat drop-off locations across California. This option is best for you if you have fewer than 3 mercury thermostats a year to dispose of; if you have more, please consider ordering your own container. Place each thermostat in its own sealed, clear plastic bag, find your nearest drop-off location, and dispose of the thermostats at that location.


filling out form

If you’re a service technician, you’re eligible for the California consumer rebate if you can attest, under penalty of perjury, to both of the following:

  • Your California state residency
  • That the returned mercury thermostat(s) were removed from a building or facility in California.

Download, print, and fill out the rebate form to receive a $30 mail-in rebate per mercury thermostat. Collection locations should also have these forms available and with carbon-backing to supply a copy of the form for you.

The following downloadable materials are available to help share more information about safe, proper mercury thermostat disposal:

Commonly Asked Questions

How do I know if I come across a mercury thermostat?

To determine if your thermostat contains mercury, inspect the thermostat to see if it contains a lever or dial to control the temperature. Thermostats with this feature typically contain mercury. Homes or buildings whose HVAC systems haven’t been updated since the early 2000s. Areas of the state that may be lower income and therefore not updating their HVAC systems regularly or in the past decade. 

Why do mercury thermostats require special disposal?

In normal use, mercury-containing thermostats are safe and do not expose people to mercury. However, if mercury thermostats are improperly handled or disposed of, the glass tube of liquid mercury may break, causing the mercury to vaporize. This can cause serious health problems – particularly among children and pregnant women. Mercury-containing thermostats that are not disposed of at a hazardous waste collection site can expose sanitation workers, soil and groundwater to toxic mercury contamination. So, improper care and disposal of mercury-containing thermostats are dangerous to both public and environmental health.

What are the health risks of being exposed to mercury?

Mercury is toxic and exposure even in small amounts may cause serious health problems. Breathing mercury vapors can harm the nervous system, lungs and kidneys. Mercury vapors can also pass easily from the lungs to the bloodstream. Children under 14 are more sensitive to mercury than adults because of their developing brains and nervous systems – and may be irreversibly damaged by it. Mothers who are exposed to mercury and breast-feed may also expose their infant children through their milk.

What are the consequences of throwing a mercury thermostat in the trash?

Failure to properly dispose of mercury-containing thermostats can result in a $70,000 fine.

Who is eligible for the rebate?

A $30 per mercury thermostat mail-in rebate is available to consumers or service technicians (NOT California licensed contractors) that attests, under penalty of perjury, to both of the following:

• Their California state residency.

• That the returned mercury thermostat(s) were removed from a building or facility in California.

Any questions? Email