iiinova — where your digital self keeps evolving

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.

000

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

022

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).

231

Inversion Documentary @inversion-doc.bsky.social · 16/06/2026

And the SmellPGH reports from residents. Notice the wind direction pointing from Edgar Thomson into the SmellPGH reports. #AirQuality

Shows SmellPGH screen shot and a variety of dark purple, orange, and red triangles indicating SmellPGH reports in the East End of Pittsburgh traveling south to West Mifflin.

031

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

163

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.

000

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)

032

Reposted by Inversion Documentary

Group Against Smog and Pollution (GASP) @gasp-pgh.bsky.social · 09/06/2026

Morning! Here is today’s air quality forecast for Allegheny County:

011

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

142

Inversion Documentary @inversion-doc.bsky.social · 05/06/2026

As expected, plenty of SmellPGH reports today: (shows report indicating "Nausea, headache, sore throat" and smell description of "Sulfur". Also shows Pittsburgh filled with orange, and red and purple triangles indicating smell complaints)

100

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

110

Inversion Documentary @inversion-doc.bsky.social · 04/06/2026

And you can see how a high-pollution zone was created just downwind of Edgar Thomson Plant here:

Red circles indicating high PM2.5 readings on PurpleAir monitors around Swissvale

001

Inversion Documentary @inversion-doc.bsky.social · 04/06/2026

And look at what community members have to say about the smells via SmellPGH (thx @cmucreatelab for that app!) "eggy, industrial" and "burnt plastic" "rotten eggs" "sulfur" "coal smoke and dust" #AirQuality #Pittsburgh

Smell Description: Like burning p**p and rotten eggs

Smell Description: Sulfur, rotten eggs, coal smoke and dust

111

Inversion Documentary @inversion-doc.bsky.social · 04/06/2026

And the plume in the BreatheCam video got going a little before 8am, which corresponds to this major spike on PurpleAir monitors downwind of Edgar Thomson Plant: [spike of around 142.3 µg/m3 pm2.5 on VCAN 12 PurpleAir]

101

Inversion Documentary @inversion-doc.bsky.social · 04/06/2026

Elevated hydrogen sulfide, or H2S (rotten egg smell) in Braddock and Clairton this AM: [ACHD H2S reading of 5 ppb in Braddock and 7 ppb in Clairton]

H2S reading in Clairton of 7ppb and Braddock of 5ppb this AM at 5am.

100

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)🧵

112

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.)

032

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)

152

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.)

011

Inversion Documentary @inversion-doc.bsky.social · 29/05/2026

It appears that the smell may have been coming from the Clairton area. Check out PlumePGH from the CREATE Lab for both the 22nd and 23rd. plumepgh.org?date=2026-05...

plumepgh.org

Plume PGH 2026-05-22

Plume Pittsburgh Model for 2026-05-22.

010

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…

011

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)

021

Reposted by Inversion Documentary

Group Against Smog and Pollution (GASP) @gasp-pgh.bsky.social · 19/05/2026

For those just logging on:

032

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

002

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.

000

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

000

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

021

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

133

Inversion Documentary @inversion-doc.bsky.social · 10/03/2026

It's just awful. And sad. And infuriating.

120

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.

120

Inversion Documentary @inversion-doc.bsky.social · 09/03/2026

It stinks this AM. Lots of SmellPGH complaints, and high hydrogen sulfide at the Liberty monitor. And the Braddock monitor doesn't seem to be operational right now. Ugh. www.alleghenycounty.us/Services/Hea...

alleghenycounty.us

Hydrogen Sulfide

Your browser does not support inline frames. Please visit https://tableau.alleghenycounty.us/t/PublicSite/views/H2SDash/HourlyReadings?%3Aembed=y&%3AshowVizHome=no&%3Ahost_url=https%3A%2F%2Ftableau.al...

000

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.

141

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.

122

Inversion Documentary @inversion-doc.bsky.social · 09/02/2026

And the ACHD dispersion report. Not good.

Air Quality Forecast and Dispersion Outlook for Allegheny County, PA on February 9, 2026. Shows forecasted unhealthy air at 104 AQI today, moderate tomorrow at 80 AQI tomorrow, and strong surface inversion expected this morning, tonight, and tomorrow morning. Weak inversion this evening.

010

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.

132

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!

121

Reposted by Inversion Documentary

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...

012

Inversion Documentary @inversion-doc.bsky.social · 06/01/2026

Hydrogen Sulfide (H2S) levels have been elevated this AM. And it smells like it STILL at my house. The stench hasn't broken. Weather forecast indicates to my eyes that it might blow out by 1pm today. Until then, I'm holding my nose. @gasp-pgh.bsky.social @breathe-project.bsky.social

Hydrogen Sulfide levels graph in Allegheny County, showing high levels for the past 24 hours, higher than nearly all days since September.

021

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.

111

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. 🎼🎶

010

Reposted by Inversion Documentary

PennFuture @pennfuture.bsky.social · 24/11/2025

Pittsburgh Region, check this out:

022

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.

021

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...

011