Know What You Breathe.

Share What You Know.


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

Be part of our citizen's air monitoring grid

Join our citizen's effort to establish an air monitoring grid that will help collect data about the quality of air we all breathe. For dangerous particulate matter (PM) pollution, TCEQ — the state regulating agency — has relied largely on a single air monitor on Old Fort Worth Road. That monitor was upwind of our biggest regional (and statewide) polluters. It was taken down in April 2022 and has yet to be re-installed. This means the only way to know what we are breathing currently is by expanding our citizens' network of PurpleAir sensors.

What do we need now? Help finding hosts!

An engineer set up a grid of targeted locations for the PurpleAir sensors based on geography, wind and other information. We still have targeted sites we'd like to cover. Take a look at our map of target sites.

Can you help us find hosts in those areas? Midlothian Breathe can provide a PurpleAir sensor free of charge to our hosts. All that's needed is an outdoor electrical outlet and reliable WiFi — it plugs in with no further maintenance required for continuous real-time readings of air quality. Please email us at if you or someone you know can help cover these target sites.

Myths we hear


No, it's not. That "steam" from the stacks of our three local cement plants releases carbon monoxide, particulate matter, sulfur dioxide, volatile organic compounds and nitrogen oxide — all pollutants — into the air we breathe. 

Of the 11 cement plants in Texas, Holcim released the highest PM 2.5, sulfur dioxide and volatile organic compound emissions and the second highest PM 10 and lead emissions in 2021. Overall, it had the second highest total emissions of Texas cement plants. Find out more.


Yes, Holcim donates to local events and makes a visible stance in our area. But at the same time, it uses staff lawyers and deep funds to automatically file property tax lawsuits without mediation. Using legal maneuvers, it’s forced back millions of dollars from our school district, city and county. Finally, the Ellis County Appraisal District decided to fight back. Find out more.


On average, they do. But the current EPA target for "safe" PM (particulate matter) 2.5 is exceeded at some point almost every day and has been exceeded multiple days for each month on record. The EPA is now proposing new, more rigorous limits on PM standards. Find out more

Also, there's growing research about the long-term effects of PM exposure...even at levels below current EPA standards. Find out more. 

Plus, check out other health-related articles in Current News.