r/hazmat is a subreddit with 4k members. The most common kinds of discussions are advice requests and self-promotion, and the community frequently discusses hazmat, weekly advertising and self promotion thread, chemicals, training, and advertising.
Hazardous Materials from product creation to end of life. Emergency Responders, Contractors, and Industrial partners welcome!
Popular Themes in r/hazmat
#1
Advice Requests
: "How to Clean dried phosphoric acid"
6 posts
#2
Self-Promotion
: "Weekly Advertising and Self-Promotion Thread"
5 posts
#3
Pain & Anger
: "Am I being scammed?"
2 posts
#4
Solution Requests
: "Are there many response people with CHMM?"
1 post
#5
Opportunities
: "Fuel Transportation"
1 post
Popular Topics in r/hazmat
#1
Hazmat
: "Hazmat Fire"
90 posts
#2
Weekly Advertising And Self Promotion Thread
: "Weekly Advertising and Self-Promotion Thread"
31 posts
#3
Chemicals
: "How to Clean dried phosphoric acid"
23 posts
#4
Training
: "Post your in-house Training videos!"
21 posts
#5
Advertising
17 posts
#6
Emergency
11 posts
#7
Weekly
8 posts
#8
Thread
8 posts
#9
Regulations
7 posts
#10
Spill
6 posts
Flair Used in r/hazmat
#1
General Discussion
: "Is one of the tanks mislabeled or am I missing something?"
49 posts
#2
MOD POST
: "Weekly Advertising and Self-Promotion Thread"
34 posts
#3
Questions
: "Mercury"
33 posts
#4
Training/Tactics/Education
: "Fentanyl Cleanup?"
31 posts
#5
News
: "HCl spill on I-70"
11 posts
#6
Scenarios
: "Does anybody have an idea of what could have happened to the poor fella on the truck? I'm assuming he's dead but what happens when you get a nitric acid shower?"
8 posts
#7
Software and Tech
: "HCN Monitor"
4 posts
#8
MEME
: "I like to think this is how hazmat operations are performed"
3 posts
#9
Tools/Equipment/PPE
: "Can you use a 6 gas meter on a solid?"
3 posts
#10
Employment/Career
: "Career choice questions"
3 posts
Member Growth in r/hazmat
Yearly
+1k members(37.3%)
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About
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Last updated: September 18, 2026