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Inversion Documentary

@inversion-doc.bsky.social
60 followers 59 following 116 posts

The Unfinished Business of Pittsburgh's Air. A documentary in production by Mark Dixon. Trailer: youtu.be/WZ6OdXQOZDo . Website: inversiondoc.com .

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Inversion Documentary @inversion-doc.bsky.social · 14/09/2026
For 10 years now the SmellPGH App (by CMU's CREATE Lab) has helped community members crowd-source vital air quality information. Join the a celebration of the 10 year anniversary of SmellPGH on 9/30/26 4:00-7:00p.m., Schenley Plaza! RSVP: forms.gle/deAzQce3zFtq... #airquality
Image shows hand holding cell phone showing SmellPGH app, with small triangles on a cell phone screen indicating air quality complaints. Text says "SmellPGH IS TURNING 10 - Learn how air quality affects your health, help shape SmellPGH's future, and celebrate with us over refreshments. Wednesday, 9/30, 4-7pm, Schenley Plaza, 4100 Forbes Ave, Pittsburgh, PA 15620. CREATE Lab. Background image is in black and white showing industrial facility and plumes going up.
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Inversion Documentary @inversion-doc.bsky.social · 17/07/2026
The @breathe-project.bsky.social has a great resource about wildfire pollution and #climate change, and how to protect yourself from the smoke. Highly recommended. #airquality breatheproject.org/wp-content/u...
breatheproject.org
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Inversion Documentary @inversion-doc.bsky.social · 14/07/2026
Keep an eye out for wildfire smoke arriving in Pittsburgh late Thursday into Friday of this week. It could add a lot of pollution to our airshed if the forecast holds. #airquality@breathe-project.bsky.social @gasp-pgh.bsky.social
Map shows visualization of plume of orange to red to purple wildfire smoke forecast stretching from NY, through Pittsburgh, and into northern Minnesota (with the worst in Canada north of MN).
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Group Against Smog and Pollution (GASP) @gasp-pgh.bsky.social · 13/07/2026
HEADS UP: DEP has declared tomorrow to be a Code Orange Air Quality Action Day. Deets👉 www.pa.gov/agencies/dep...
pa.gov
DEP Declares Code Orange Air Quality Alert for Ozone for Tuesday, July 14, 2026, for Southwestern Pennsylvania
DEP Declares Code Orange Air Quality Alert for Ozone for Tuesday, July 14, 2026, for Southwestern Pennsylvania
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Inversion Documentary @inversion-doc.bsky.social · 11/07/2026
There's a new Allegheny County alert system, and you need to sign up for it if you want to stay in the loop. Thanks to @gasp-pgh.bsky.social for the primer: www.gasp-pgh.org/stay-in-the-...
gasp-pgh.org
Stay in the Know: Switch Over to the New Allegheny Alerts System by July 18
Allegheny County is completely changing its Allegheny Alerts system, and if you don't re-register before July 18, your alerts will stop. Here's how to sign up for the new system.
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Inversion Documentary @inversion-doc.bsky.social · 16/06/2026
Major pollution spike this AM and stench as expected. Plume(s) from Edgar Thomson appear to align with a significant rise in PM2.5 levels nearby. Video starts around 4:17am. (Thx to @breathe-project.bsky.social and CMU CREATE Lab for BreatheCam footage) #Stinkburgh #Pittsburgh #Airquality
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Inversion Documentary @inversion-doc.bsky.social · 15/06/2026
🚨#Stinkburgh Alert! The forecast looks like we might have stench in Pittsburgh overnight. Stay alert and submit smell complaints to SmellPGH app and ACHD.
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Inversion Documentary @inversion-doc.bsky.social · 12/06/2026
Two separate plume incidents at US Steel's Edgar Thomson Plant in Braddock, including dark grey material. US Steel wants to⬆️pollution from from ET via the new hot strip mill.🤮We have to require them to do better. (Thx to @breathe-project.bsky.social and CMU CREATE Lab for BreatheCam footage)
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Group Against Smog and Pollution (GASP) @gasp-pgh.bsky.social · 09/06/2026
Morning! Here is today’s air quality forecast for Allegheny County:
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Inversion Documentary @inversion-doc.bsky.social · 09/06/2026
Economist and author, Chris Briem, examines the fraught relationship between the steel industry and the Mon Valley. "Remaining focused on the past will only defer change that will eventually come..." #Pittsburgh www.publicsource.org/us-steel-pur...
publicsource.org
One year in, Nippon’s purchase of U.S. Steel has changed much — but not the Mon Valley
"Unchanged, so far, is the region’s failure across so many levels to address the economic collapse of the communities of the Mon Valley. Now four decades since the contraction of the regional steel in...
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Inversion Documentary @inversion-doc.bsky.social · 08/06/2026
Three more plumes at Nippon/US Steel's Edgar Thomson Plant. And USS wants to *increase* pollution at the plant with new equipment powered by fossil fuels during a climate emergency. (Thx to CMU CREATE Lab and @breathe-project.bsky.social for BreatheCam footage.) 🧵1/2
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Inversion Documentary @inversion-doc.bsky.social · 05/06/2026
🚨#Stinkburgh Alert! Conditions appear to be ripe for overnight/AM elevated pollution and stench. Stay alert, filter your air if you can, and submit smell complaints to the ACHD and SmellPGH app. #AirQuality
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Inversion Documentary @inversion-doc.bsky.social · 04/06/2026
Major pollution and complaints this AM. Also a plume at US Steel's Edgar Thomson Plant feeding right into a low air mass ~8am. Spike in PM2.5 via PurpleAir monitor, elevated H2S, and many SmellPGH complaints. #AirQuality #Pittsburgh (Thx to @BreatheProject & @cmucreatelab for BreatheCam footage)🧵
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Inversion Documentary @inversion-doc.bsky.social · 03/06/2026
Yesterday at Nippon/US Steel's Edgar Thomson Plant. Plumes coming out of multiple stacks. #AirQuality #Pittsburgh (Thx to @breathe-project.bsky.social and CMU CREATE Lab for BreatheCam footage.)
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Inversion Documentary @inversion-doc.bsky.social · 01/06/2026
Lots going on at US Steel's Edgar Thomson plant this evening. #Pittsburgh #AirQuality (Thx to @breathe-project.bsky.social and CMU CREATE Lab for BreatheCam footage)
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Inversion Documentary @inversion-doc.bsky.social · 30/05/2026
🤮 Goodness. I hope the workers in/around that building are wearing respiratory protection. #AirQuality #Pittsburgh (Thx to the @breathe-project.bsky.social and CMU CREATE Lab for BreatheCam footage showing U.S. Steel's Edgar Thomson Mill facility emitting a cloud of something TODAY 5/30/26.)
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Inversion Documentary @inversion-doc.bsky.social · 26/05/2026
Tomorrow night! See you there? "A Community's Right to Know: A Conversation on the Clairton Plant Explosion". "Panel Q+A with members from OSHA, the Chemical Safety Board, Valley Clean Air Now (VCAN) and the Allegheny County Health Department." luma.com/2lsbcivv
luma.com
A Community's Right to Know: A Conversation on the Clairton Plant Explosion · Luma
Join us for a community conversation about the Clairton Plant explosion. Hear directly from the experts, ask your questions and get answers. Panel Q+A with…
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Inversion Documentary @inversion-doc.bsky.social · 26/05/2026
What is this? Nearly an hour of emissions from US Steel Edgar Thomson Plant in Braddock yesterday. #airquality #Pittsburgh (Thx to @breathe-project.bsky.social & CMU CREATE Lab for BreatheCam footage)
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Group Against Smog and Pollution (GASP) @gasp-pgh.bsky.social · 19/05/2026
For those just logging on:
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Inversion Documentary @inversion-doc.bsky.social · 19/05/2026
High H2S this AM in Braddock.
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Inversion Documentary @inversion-doc.bsky.social · 18/05/2026
Strong inversion forecasted for tonight. Slow winds from the south. Likely stench in Pittsburgh overnight. Stay alert and submit smell complaints to SmellPGH app and ACHD website! #Airquality #Pittsburgh
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Inversion Documentary @inversion-doc.bsky.social · 15/05/2026
#Stinkburgh Alert! Likely stench and elevated pollution tonight and early next week. Send smell complaints to SmellPGH app and ACHD. This video is this AM at Edgar Thomson mill -- a hazy plume emerging this building. Thx to @breathe-project.bsky.social & CMU CREATE Lab for BreatheCam footage.
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Inversion Documentary @inversion-doc.bsky.social · 15/05/2026
I spotted seven major plumes coming out of US Steel's Edgar Thomson Plant in a single day. TODAY. 🤢 Thx to @breathe-project.bsky.social and CMU CREATE Lab for the BreatheCam footage. #airquality #Pittsburgh
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Inversion Documentary @inversion-doc.bsky.social · 03/04/2026
Weak inversion in the morning, plus slow winds from the south-ish overnight could elevate pollution a bit. Stay alert! @gasp-pgh.bsky.social @breathe-project.bsky.social
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Inversion Documentary @inversion-doc.bsky.social · 20/03/2026
🚨Stinkburgh Alert! Likely stench and elevated #air pollution tomorrow in #Pittsburgh. Stay alert and report smells to ACHD and SmellPGH app if you smell it! @gasp-pgh.bsky.social @breathe-project.bsky.social
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Inversion Documentary @inversion-doc.bsky.social · 10/03/2026
We've had elevated H2S and large numbers of SmellPGH reports the last couple days in Allegheny County. Not cool. We've hit twice the number of 24-hr exceedances of the H2S standard compared to this time last year. It really stinks around here. @gasp-pgh.bsky.social @breathe-project.bsky.social
Chart showing days over the 24-hr standard in 2026 YTD at 30, vs. Same period in 2025 at 13. Chart shows H2S levels at 14ppb at the Liberty monitor. There's a red line at 5ppb.
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Inversion Documentary @inversion-doc.bsky.social · 26/02/2026
🚨‼️#Stinkburgh Alert! Strong inversion forecasted for tomorrow morning. Wind from the south. I anticipate that some areas will experience elevated pollution and stench overnight and tomorrow morning. Stay alert. Report smells via ACHD and SmellPGH if you smell something.
Air Quality Forecast and Dispersion Outlook for Allegheny County showing that there will be a Strong surface inversion tomorrow, with Moderate overnight.
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Inversion Documentary @inversion-doc.bsky.social · 17/02/2026
🚨🚨#Stinkburgh Alert‼️🤮 It's just awful outside. Loads of SmellPGH reports. Elevated VOC's, particles, and H2S pollution. The foul sulfur odor woke me up early this morning. Submit complaints to ACHD & SmellPGH app if you smell it. #AirQuality @gasp-pgh.bsky.social @breathe-project.bsky.social
Lots of red PurpleAir dots on map of Pittsburgh and Mon Valley showing elevated PM2.5 pollution.Elevated VOC readings on an Awair monitor for this morning and yesterday morning. Many, many dark purple SmellPGH reports in Pittsburgh, with several going into the Mon Valley.ACHD console showing elevated H2S many times in the last several days, including today at the Liberty monitor.
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Inversion Documentary @inversion-doc.bsky.social · 09/02/2026
‼️#Stinkburgh Alert! ACHD is already reporting a Mon Valley Air Pollution Warning. Particles, VOC’s, and H2S levels are high. Elevated pollution expected into tomorrow, too. Please be careful out there and report smells to the ACHD and SmellPGH if you encounter them.
Image shows H2S levels above the red line of 5ppb today, with some higher spikes in the past few days. PurpleAir monitor map shows red, purple, orange, and yellow dots, and a few green - but the green are mostly indicated as indoor dots. This shows air pollution is relatively high in the region, particularly the Mon Valley area. SmellPGH app showing triangles in the Pittsburgh region, more purple in the area around Jefferson Hills, more orange near Pittsburgh. Orange and red pollution monitors in Clairton and Liberty, respectively. Image shows graph of VOC levels rising into orange today.
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Inversion Documentary @inversion-doc.bsky.social · 06/01/2026
It was so bad this morning! Thanks to GASP for this write-up! And there is a link lower in the post that explains how to submit an air quality complaint. If you are annoyed by the pollution and/or smell, please submit a complaint to SmellPGH AND the ACHD GovQA system!
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Group Against Smog and Pollution (GASP) @gasp-pgh.bsky.social · 06/01/2026
Yinz smell that?! That tell-tale stench of rotten eggs? Culprit could be concentrations of Hydrogen sulfide (or H2S for short) that are sky-high in & around the Mon Valley. But the exceedances don’t tell the whole story. There were also CRAZY HIGH H2S spikes. www.gasp-pgh.org/smell-that-f...
gasp-pgh.org
Smell That? First H2S Exceedances of 2026 in the Books; GASP Calls on ACHD to Address Stench Issue
Yinz smell that?! That tell-tale stench of rotten eggs? You’re not smelling things: Concentrations of Hydrogen sulfide (or H2S for short) are sky-high in and around the Mon Valley today.And you’re not...
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Inversion Documentary @inversion-doc.bsky.social · 06/01/2026
‼️#Stinkburgh Alert!! 🚨 I woke up around 5am with a headache and the noxious foul odor of sulfur in my bedroom. VOC levels outside were super high overnight. Particles are also up. Just intolerable. I feel violated. #Pittsburgh @breathe-project.bsky.social
SmellPGH app showing red triangles in the Mon Valley area around Pittsburgh, indicating stench reports.PurpleAir map show with lots of orange red and purple levels in and around the Mon Valley near Pittsburgh.High VOC levels per an Awair monitor graph.
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Inversion Documentary @inversion-doc.bsky.social · 18/12/2025
🎼🎶It's beginning to look a lot like a weather inversion. Image shows Edgar Thomson Plant engulfed in low lying clouds. Pollution also gets trapped with the low-lying air. We have inversions often in Pittsburgh, but not usually so visually clear. 🎼🎶
Image shows Edgar Thomson Plant engulfed in low lying clouds.
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PennFuture @pennfuture.bsky.social · 24/11/2025
Pittsburgh Region, check this out:
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Inversion Documentary @inversion-doc.bsky.social · 25/11/2025
#Stinkburgh Alert ‼️ I haven’t smelled it this bad in a long time. Amazing sulfur and burnt plastic smell. And my Awair VOC sensor is *really* high. 🤮
Graph showing spikes in morning and evening. Evening spike goes to purple.
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Inversion Documentary @inversion-doc.bsky.social · 30/10/2025
"Companies were allowed to estimate their chemical pollution using methods that even the EPA conceded were often unreliable. In 2023, the EPA received irrefutable proof that these estimates were highly flawed." www.propublica.org/article/epa-...
propublica.org
Air Pollution From Industrial Facilities Is Far Worse Than Estimated
The Trump administration has put a stop to EPA rules that would have required more than 130 industrial facilities to install air monitors to measure pollution. Millions of people living near these pla...
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Inversion Documentary @inversion-doc.bsky.social · 24/10/2025
What is this big bright light? This video mostly shows Nippon/US Steel's Edgar Thomson Plant, but I can't tell if the bright light is actually inside the plant grounds. Happened at about 8:53pm on 10/19/2025. (BreatheCam footage via @breathe-project.bsky.social and CMU Create Lab)
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Inversion Documentary @inversion-doc.bsky.social · 17/10/2025
‼️#Stinkburgh Alert! Walked out my front door a few minutes ago and learned that the "moderate inversion" had yielded awful industrial smells at my house, but not until about 9am. Looks like I'm not the only one reporting. Hopefully clearing out soon, but tomo might also be bad.
PurpleAir graph showing elevated levels of PM2.5 starting around 9am. SmellPGH app image showing lots of triangles in Pittsburgh today - triangles indicating smell reports.
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Group Against Smog and Pollution (GASP) @gasp-pgh.bsky.social · 03/10/2025
#ICYMI: What’s going on at @ussteel.bsky.social’s Edgar Thomson facility? @inversion-doc.bsky.social has flagged myriad emissions events like this one from yesterday:
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Inversion Documentary @inversion-doc.bsky.social · 02/10/2025
This morning there was a massive plume emitted from Nippon/US Steel's Edgar Thomson Mill in the greater Pittsburgh area. There was a massive spike in particles across the river about that time. The Allegheny County Health Dept needs to investigate. @breathe-project.bsky.social @gasp-pgh.bsky.social
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Inversion Documentary @inversion-doc.bsky.social · 02/10/2025
‼️#Stinkburgh Alert! Strong inversion predicted for tomorrow morning in Pittsburgh. Looks like it might get worse over the weekend. Submit #SmellPGH complaints and @HealthAllegheny complaints as you encounter stench! @GASPPgh @BreatheProject @cmucreatelab
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Inversion Documentary @inversion-doc.bsky.social · 02/10/2025
It reeeeeaaaalllyyyy stinks like rotten eggs at my house in #Pittsburgh right now. #H2S #Stinkburgh 🏠🤢💩🏭
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Inversion Documentary @inversion-doc.bsky.social · 28/09/2025
‼️#Stinkburgh Alert! Stench is widely reported across the Pittsburgh region today. VOC and particle levels elevated in certain areas. I decided against my morning walk because of the stench. 💩
Map of Pittsburgh with red and orange triangles across much of the eastern end of the city.  PurpleAir nap of air pollution showing elevated levels moving up the Mon Valley int Pittsburgh.
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Inversion Documentary @inversion-doc.bsky.social · 19/09/2025
What in the world happened at Nippon/US Steel's Edgar Thomson facility last night? #AirQuality Footage thanks to @breathe-project.bsky.social and CMU CREATELab. It went on for about 3 HOURS. Local air monitors seem to correlate. @gasp-pgh.bsky.social also reported high H2S last night. 🤬 🧵
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Group Against Smog and Pollution (GASP) @gasp-pgh.bsky.social · 19/09/2025
HEADS UP: Mon Valley waking up to *another* day of stench and H2S values that exceed the PA 24-hr avg standard. Smell it? Make reports to ACHD & via SmellPGH. 👀😷
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Inversion Documentary @inversion-doc.bsky.social · 18/09/2025
🚨#Stinkburgh Alert! It’s not looking good for stench overnight and into the morning. Plus an ozone alert for the afternoon. Stay careful out there! 😶‍🌫️
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Inversion Documentary @inversion-doc.bsky.social · 12/09/2025
🚨#Stinkburgh Alert! Suffocating burnt plastic smell in Squirrel Hill South right now. Winds coming from the south per my new little Tempest weather station. Not sure what it is. Ugh. SmellPGH shows I’m not the only one smelling it.
SmellPGH map showing a few triangles in Squirrel Hill South and Swissvale. Wind readings from a Tempest weather station showing wind direction lately floating north.
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Inversion Documentary @inversion-doc.bsky.social · 03/09/2025
🚨#Stinkburgh Alert! Last night and much of today was pretty stinky. My house saw high VOC's, too. How about for you? Report smells to the SmellPGH app and ACHD website. Tonight isn't looking much better. Ugh. 🤢 #airquality
Allegheny County Health Department dispersion report and forecast for tomorrow. Strong inversion this AM. Another strong inversion for tomorrow morning. Tomorrow will see moderate PM2.5 at 58 AQI in Pittsburgh, 55 in Liberty-Clairton area.  SmellPGH image showing triangles clustered near Dormont but also widely spread across the region. Awair readings showing a peak last night and this morning into red/orange territory, before dropping down to green levels by later in the morning.
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Inversion Documentary @inversion-doc.bsky.social · 28/08/2025
🚨#Stinkburgh Alert! Lots of stench reported last night. How are you doing?
SmellPGH image showing many dark red triangles across the eastern end of Pittsburgh.
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Inversion Documentary @inversion-doc.bsky.social · 21/08/2025
Super-compelling new report just released by @envirointegrity.bsky.social about emissions from the steel industry across the country. The report includes details about benzene at US Steel's Clairton Coke Works. Take a look. 🏭 👀
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