Support better monitoring

Let science speak!


With the cement plant on Dove Lane set to increase emissions, Midlothian Breathe is gearing up to ensure that we have appropriate air quality monitoring. Current particulate matter (PM) levels are close to exceeding safe air standards, and they already exceed levels recommended by former EPA advisory scientists.

Help us all breathe easier. DONATE to help purchase PurpleAir monitors to be placed around Midlothian to capture air quality data and map it in real time.


The graphic to the right shows REAL TIME air quality readings from the PurpleAir sensor in Overlook Estates, southwest of the Holcim plant, our largest area polluter. To see all local sensors, go to The readings vary depending on meteorological conditions and other activity, including the heavy industry emissions prevalent in our area.

Why do citizens need to take action?

Currently, TCEQ — the state regulating agency — uses a single monitor on Old Fort Worth Road to capture particulate matter (PM) data used to determine whether industry in our area is complying with current EPA standards. This monitor is upwind of the Holcim plant, which is the worst polluter of the three cement plants in our area and one of the worst in Texas. We need a more representative sampling of air — the health of our children, seniors and medically at-risk population is at stake.

Using PurpleAir monitors, we can create a grid that provides publicly available data in locations that TCEQ does not cover.

What are PurpleAir monitors?

PurpleAir monitors record real-time air quality data that is shared and mapped on At about the size of a softball, these sensors are mounted outside and are connected to the internet. They use laser particle count technology to measure particulate matter in the air (like cement plant emissions, dust, smoke and other suspended particles).

Information collected with the air sensors is aligned with the EPA Air Quality Index, and is represented using color indicators for different pollutant levels. Graphs of averages over time and comparisons between sensors will provide baselines to identify issues with our local air quality.

What can you do?

DONATE! Each monitor costs $250 -$280, depending on whether an SD card is needed. We’re currently asking for community support in buying these monitors and/or identifying potential PurpleAir sensor locations.

Please help. You’ll breathe easier!

Volunteer by emailing And follow us on Facebook.