Asbestos testing service · Boulder, CO · reviewed since 2019
iHow the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 64%96+61Reliability 28%95+26.8Replies to reviews 8%21+1.7Experts Score= 89Not enough data for value; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.89SCORE
AGradeiLetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20.
#124 of 231 hazardous material removaliPosition by Experts Score among all companies we track in this category. · better than 47%
5.0★★★★★672 Google reviews · 24 photos
98%five-star reviews
4.98★last 12 monthsiAverage stars on reviews from the last 12 months only.
0.6%1–2★ in 2 yearsiShare of 1–2★ reviews in the last 24 months — or the 20 newest reviews when the company had fewer than 20 in that time.
Google reviewers rate Rex Environmental 5 out of 5 stars based on 672 reviews, with the owner replying to 19% of them. Customers frequently praise the company for punctuality, professional conduct, and clear communication regarding asbestos and hazardous materials testing. Many note that staff are helpful in explaining regulatory frameworks and providing detailed reports. However, some lower-rated reviews criticize the company for poor organization, missed appointments, and billing disputes involving unauthorized work or transaction fees.
Google rating: 5.0 out of 5 from 672 reviews (98% five-star).
Reviews on this page: 672 Google reviews (628 with written comments, 7 with photos).
Owner responses: the business replied to 19% of reviews.
Most recent review: October 23, 2026.
Service: Hazardous Material Removal Service serving Boulder, Colorado.
Data from Google, last updated October 25, 2026.
Score profile vs other hazardous material removal
Score per factor (100 = best)iEach factor is scored 0–100 on absolute terms (star average, share of 1–2★ reviews, price verdicts…); standing within the category can only raise it, never lower it.. Strongest: craft & service and momentum; weakest: replies to reviews.
Rex EnvironmentalHazardous Material Removal median0 = centre, 100 = best
SatisfactioniSatisfaction · 54% of the scoreRecency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.Rex Environmental: 96/100 on this factor. Category median: 93.A
96
ReliabilityiReliability · 24% of the scoreHow rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.Rex Environmental: 95/100 on this factor. Category median: 92.A
95
Craft & serviceiCraft & service · penalty only, up to −10 pointsGoogle review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.Rex Environmental: 100/100 on this factor. Category median: 98.A
100
ValueiValue · 14% of the scoreCustomers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Not enough reviews for this factor yet. Category median: 100.–
–
MomentumiMomentum · penalty only, up to −10 pointsPenalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.Rex Environmental: 100/100 on this factor. Category median: 100.A
100
Replies to reviewsiReplies to reviews · 7% of the scoreHow often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.Rex Environmental: 21/100 on this factor. Category median: 67.D
21
Bar = this company · dark tick = category median.
Star ratings
672 Google reviews we collected
5.0of 5
5 stars65998%
4 stars61%
3 stars20%
2 stars10%
1 star41%
Praise vs complaints
Phrases our text analysis found in 628 written reviews
99%praise
Praise1,48299%
Complaints141%
Topic share
How often each topic comes up in the written reviews
7topics
Staff & attitude47432%
Speed & response34123%
Would recommend20814%
Quality & results20113%
Communication19113%
Honesty & trust493%
Price & value322%
What customers talk about
We read 628 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.
“Betty is especially wonderful—she’s friendly, helpful, and great to work with.”
“They provide excellent reports and have a quick response time.”
“If you’re looking for hazardous materials testing, I highly recommend Rex Environmental for their reliable, efficient, and professional service”
“Either way, I would recommend avoiding Rex for asbestos testing.”
“I had great experience working with Rex Environmental!”
“…dn't try again, and didn't reach out via email when the phone number didn't work), and pretty aggressive responses to my inquiries when I followed up…”
“In our business we expect great service and communication and that is exactly what the entire Rex Environmental team delivers.”
“I have known Tony for quite some time and anytime we are in need there is nobody else we trust.”
“They were very prompt, reasonably priced, and I got the report the next day.”
“I had previously had someone out who only took one sample which is not even legal and overcharged me massively.”
People customers mention
Jordy40 reviews
Michelle20 reviews
Eric17 reviews
Robert16 reviews
Josue10 reviews
Eduardo10 reviews
praise complaint · found by our text analysis, Google review wording unchanged.
Recent reviews
Anthony2 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a day ago★★★★★
I had great experience working with Rex Environmental! They provide excellent reports and have a quick response time. Betty is especially wonderful—she’s friendly, helpful, and great to work with. Their professionalism and excellent customer service make the whole process smooth and easy. If you’re looking for…
Frankie5 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a day ago★★★★★
I work regularly with Betty and the team at REX for asbestos consulting, and they’ve been great to work with. I appreciate their support and would recommend REX to anyone looking for an asbestos consulting firm.
Stephanie2 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a day ago★★★★★
I had air testing done at my house and Liam Posey was great! Very professional.
Pete7 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a day ago★★★★★
Rex Rocks! We have been using Rex Environmental’s services for years. Betty, Josue & Tony are true leaders that make it happen. In our business we expect great service and communication and that is exactly what the entire Rex Environmental team delivers. I would highly recommend Rex!
boogersLocal Guide · 56 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 2 days ago★★★★★
Christina was a huge help on my rental property in Denver. She provided me all the resources I needed and where to go for assistance with regulatory framework.
Highly recommend Rex Environmental.
JudsonLocal Guide · 35 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 2 days ago★★★★★
Rex is great. Especially Tony! He helped us recently with a customer that had a leak in their basement and did a fantastic job. Highly professional and fairly priced!
I had great experience working with Rex Environmental! They provide excellent reports and have a quick response time. Betty is especially wonderful—she’s friendly, helpful, and great to work with. Their professionalism and excellent customer service make the whole process smooth and easy. If you’re looking for hazardous materials testing, I highly recommend Rex Environmental for their reliable, efficient, and professional service
Frankie Medina5 reviewsiTotal number of Google reviews Frankie has written across all businesses on Google Maps, not just this one.
I work regularly with Betty and the team at REX for asbestos consulting, and they’ve been great to work with. I appreciate their support and would recommend REX to anyone looking for an asbestos consulting firm.
Stephanie Williams2 reviewsiTotal number of Google reviews Stephanie has written across all businesses on Google Maps, not just this one.
Rex Rocks! We have been using Rex Environmental’s services for years. Betty, Josue & Tony are true leaders that make it happen. In our business we expect great service and communication and that is exactly what the entire Rex Environmental team delivers. I would highly recommend Rex!
boogers pickerLocal Guide · 56 reviewsiTotal number of Google reviews boogers has written across all businesses on Google Maps, not just this one.
Christina was a huge help on my rental property in Denver. She provided me all the resources I needed and where to go for assistance with regulatory framework.
Highly recommend Rex Environmental.
Judson RobertsonLocal Guide · 35 reviewsiTotal number of Google reviews Judson has written across all businesses on Google Maps, not just this one.
Rex is great. Especially Tony! He helped us recently with a customer that had a leak in their basement and did a fantastic job. Highly professional and fairly priced!
Official3H73 reviewsiTotal number of Google reviews Official3H7 has written across all businesses on Google Maps, not just this one.
I have been working with and using Rex environmental for over 3 years now and have had zero issues.
The company is quick, fast and communicates very well with myself and our customers.
If you are looking for an awesome company for your environmental services, this is definitely the company to use 😎
Glass Monkey LLCLocal Guide · 24 reviewsiTotal number of Google reviews Glass has written across all businesses on Google Maps, not just this one.
I have known Tony for quite some time and anytime we are in need there is nobody else we trust. His patience and thoroughness is why we always use him. I couldn’t recommend him or Rex Environmental enough!
Justin HillLocal Guide · 71 reviewsiTotal number of Google reviews Justin has written across all businesses on Google Maps, not just this one.
It has been a pleasure working with Tony on our project. He has been very professional throughout the whole process and just eased our minds during the testing process. Would absolutely recommend them to anyone that is concerned about their home environment.
Daniel4 reviewsiTotal number of Google reviews Daniel has written across all businesses on Google Maps, not just this one.
