r/hazmat is a subreddit with 4k members. The community frequently discusses hazmat, weekly advertising and self promotion thread, chemicals, training, and advertising, and the most common flair used is general discussion, questions, training/tactics/education, mod post, and scenarios.
Hazardous Materials from product creation to end of life. Emergency Responders, Contractors, and Industrial partners welcome!
Popular Topics in r/hazmat
#1
Hazmat
90 posts
#2
Weekly Advertising And Self Promotion Thread
31 posts
#3
Chemicals
23 posts
#4
Training
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?"
20 posts
#2
Questions
: "Mercury"
20 posts
#3
Training/Tactics/Education
: "Fentanyl Cleanup?"
17 posts
#4
MOD POST
: "Weekly Advertising and Self-Promotion Thread"
13 posts
#5
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?"
6 posts
#6
News
: "HCl spill on I-70"
5 posts
#7
Tools/Equipment/PPE
: "Can you use a 6 gas meter on a solid?"
4 posts
#8
Software and Tech
: "HCN Monitor"
4 posts
#9
Employment/Career
: "Career choice questions"
2 posts
#10
Photos
: "I miss this"
1 post
Member Growth in r/hazmat
Yearly
+1k members(34.3%)
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Last updated: September 30, 2026