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 dispose of this? From a museum collection and not even my supervisor knows what was in it."
15 posts
#2
Self-Promotion
: "****1000**** Subscribers! Thank you HazManiacs. To mark the event, I have renovated a little bit."
2 posts
#3
Pain & Anger
: "Am I being scammed?"
1 post
Popular Topics in r/hazmat
#1
Hazmat
: "Hazmat Fire"
90 posts
#2
Weekly Advertising And Self Promotion Thread
31 posts
#3
Chemicals
: "Selling products containing Chemicals in Europe? Here's a site to check the regulatory status under REACH"
23 posts
#4
Training
: "Getting some good Training some level B!"
21 posts
#5
Advertising
17 posts
#6
Emergency
: "What's the difference between a fire department HAZMAT team and doing Emergency response for an environmental services company? What would warrant one or the other in terms of type of incident response?"
11 posts
#7
Weekly
8 posts
#8
Thread
8 posts
#9
Regulations
: "Dangerous Goods Regulations"
7 posts
#10
Spill
: "Toxic waste Spill in northern Alberta biggest of recent disasters in North America"
6 posts
Flair Used in r/hazmat
#1
General Discussion
: "Is one of the tanks mislabeled or am I missing something?"
22 posts
#2
Training/Tactics/Education
: "Cleaned a 4millon gallon gas tank today w/ lined air"
18 posts
#3
Questions
: "Mercury"
13 posts
#4
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
#5
Photos
: "Decon training today"
6 posts
#6
MOD POST
: "Some Big Changes Inbound!"
5 posts
#7
News
: "HCl spill on I-70"
4 posts
#8
MEME
: "When you join the Hazmat Team"
3 posts
#9
MEME/Humor
: "It could happen..."
2 posts
#10
Self
: "Employer forcing me to ship hazmat without a hazmat certification."
2 posts
Member Growth in r/hazmat
Yearly
+820 members(25.9%)
Similar Subreddits to r/hazmat
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117k members
5.5% / yr
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Last updated: June 24, 2026