Know What You Breathe.

Share What You Know.


Help us all breathe easier. DONATE to help purchase PurpleAir sensors 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 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.

Let science speak

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 pollution, TCEQ — the state regulating agency — relies largely on a single air monitor on Old Fort Worth Road. That monitor is upwind of our biggest regional (and statewide) polluters. For the majority of the year, area emissions aren't being adequately captured.

You can buy your own portable sensor, help fund a sensor for others, or apply to put a sensor up at your home or business. Find out more.

Help us locate hosts to build our air monitoring grid

An engineer set up a grid of targeted locations for the PurpleAir sensors based on geography, wind and other information. See what's happening with our current air monitors in our growing grid. Help us find hosts in the following areas of Midlothian shown in the map below. Midlothian Breathe can provide the monitor, free-of-charge. All you need is an outdoor electrical outlet and reliable WiFi--plug it in with no further maintenance required for continuous real-time, readings of air quality in your own backyard. Please email us at if you or someone you know is interested in hosting.

Overview Map of Target Sites Needing Air Monitors

Map Legend

Red Marker=high priority location, no hosts identified yet

Blue Marker=hosts identified but monitors not yet placed

Green Marker=host identified and monitor in the process of being placed

Click Below to See Target Locations by Quadrant

Show your support

Let the world know you support the effort to insure the cleanest air possible for our kids and families in Midlothian, Texas. Sign HERE today!

City council accepts gift of a PurpleAir sensor

We are pleased to share some exciting news that our gift of a PurpleAir sensor to the Midlothian city council was accepted, indicating that we are effectively changing attitudes in our town.

We really appreciate everyone’s help in making this happen. The PurpleAir sensor is already installed at Kimmel Park and is a great first step for the community. Please thank your city representatives for making this possible and bringing positive publicity to our cause.

Holcim update

Midlothian Breathe, a group of Moms for Clean Air, recently fought to oppose LafargeHolcim's permit request to increase pollution.

Despite that fight, the cement plant on Dove Lane in Midlothian, Texas, has obtained approval from TCEQ to burn more petroleum coke (pet coke), a highly dirty fuel.

That's why our PurpleAir network of sensors is so important. With this area already close to exceeding pollution limits, Midlothian Breathe's job is to help shore up the inadequate monitoring provided now.

See TCEQ's official response to public comments on the permit request.

5 actions now

What can we do?

Continue to advocate for our families and kids by:

  1. Pushing for another TCEQ monitor north of Holcim and Ash Grove to adequately capture those plants' emissions, the worst in this area.

  1. Setting up a citizen network of PurpleAir sensors and sharing data from the grid.

  1. Calling out bad air days to increase community awareness of issues with local air quality.

  1. Promoting better regulations to safeguard public health, many already standard practice in other states.

  1. Keeping tabs on the latest health, environmental and safety information as it pertains to air quality.

Validation of our concerns by an independent expert

Thanks to community donors, Dr. Ron Sahu reviewed LaFargeHolcim's most recent permit application. He identified many issues with the permit that still remain relevant — despite permit approval.

  • Evidence that Holcim's equipment and pollution controls are functioning poorly

  • Misapplication of EPA terms to understate pollution increases and avoid more extensive EPA oversight

  • Lack of supporting evidence for company conclusions, including non-validated, tenuous predictions for highly toxic PM 2.5, showing Holcim will be taking PM 2.5 levels to the very maximum allowed levels

  • Unexplained increases in carbon monoxide compared to other emissions

  • Use of old meteorological data from as far away as Corsicana and Shreveport (rather than more recent data from more proximate locations) to model what will happen to emissions with the new permit

Take a closer look at the independent review findings to understand why we shouldn't sit back and accept industry claims.

Myths We Hear


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

Of the 10 cement plants in Texas, Holcim releases the most emissions of all of those toxins, except for nitrogen oxide, where it ranks second. The company should be striving to improve air quality, not make it worse. 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 forcing back millions of dollars from our school district, city and county. However, it's hopeful that countersuits by the Ellis County Appraisal District may shed more light on what's equal and uniform. The EAD is currently waiting on a verdict. Find out more.


On average, they do. But the 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. We expect these bad days to increase when Holcim's permit request is approved. Find out more.

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

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