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M.A.R.S. Environmental

Environmental consultant · Boulder, CO · reviewed since 2022

How 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%93+59.1Reliability 28%94+26.5Replies to reviews 8%78+6.4Experts Score= 92Not 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.92SCORE
AGradeLetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20.
#112 of 231 hazardous material removalPosition by Experts Score among all companies we track in this category. · better than 52%
4.9 ★★★★★ 104 Google reviews · 15 photos
97%five-star reviews
4.96★last 12 monthsAverage stars on reviews from the last 12 months only.
0%1–2★ in 2 yearsShare of 1–2★ reviews in the last 24 months — or the 20 newest reviews when the company had fewer than 20 in that time.
20%reviews answered by the owner
Oct 2026latest review

M.A.R.S. Environmental at a glance

Google reviewers rate M.A.R.S. Environmental 4.9 out of 5 based on 104 reviews, with the owner responding to 20% of them. Clients frequently praise the company for punctuality, professional communication, reasonable pricing, and thorough testing services for mold, asbestos, radon, and fire damage. Recurring themes include knowledgeable staff who clearly explain results and responsive scheduling. However, two low-star reviews criticize the firm for incomplete remediation work, lack of follow-up, and charging extra fees for errors.

  • Google rating: 4.9 out of 5 from 104 reviews (97% five-star).
  • Reviews on this page: 104 Google reviews (87 with written comments).
  • Owner responses: the business replied to 20% of reviews.
  • Most recent review: October 8, 2026.
  • Service: Hazardous Material Removal Service serving Boulder, Colorado.

Data from Google, last updated November 8, 2026.

Score profile vs other hazardous material removal

Score per factor (100 = best)Each 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: momentum and reliability; weakest: replies to reviews.

Satisfaction93Reliability94Craft & service–Value–Momentum100Replies to reviews78Satisfaction: 93 (median 93)Reliability: 94 (median 92)Momentum: 100 (median 100)Replies to reviews: 78 (median 67)
M.A.R.S. EnvironmentalHazardous Material Removal median0 = centre, 100 = best
SatisfactionSatisfaction · 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.M.A.R.S. Environmental: 93/100 on this factor. Category median: 93.A
93
ReliabilityReliability · 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.M.A.R.S. Environmental: 94/100 on this factor. Category median: 92.A
94
Craft & serviceCraft & 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.Not enough reviews for this factor yet. Category median: 98.–
–
ValueValue · 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.–
–
MomentumMomentum · 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.M.A.R.S. Environmental: 100/100 on this factor. Category median: 100.A
100
Replies to reviewsReplies 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.M.A.R.S. Environmental: 78/100 on this factor. Category median: 67.B
78

Bar = this company · dark tick = category median.

Star ratings

104 Google reviews we collected

  • 5 stars10197%
  • 4 stars11%
  • 3 stars00%
  • 2 stars00%
  • 1 star22%

Praise vs complaints

Phrases our text analysis found in 87 written reviews

  • Praise19298%
  • Complaints42%

Topic share

How often each topic comes up in the written reviews

  • Staff & attitude4925%
  • Speed & response3719%
  • Quality & results3417%
  • Would recommend3417%
  • Communication2111%
  • Price & value147%
  • Honesty & trust74%

What customers talk about

We read 87 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.

  • “My experience with them as always been professional, with integrity, and knowledgeable.”
  • “they were very quick to set up an appointment, arrived right on time and their representative was knowledgeable and very pleasant.”
  • “I highly recommend this quality, top notch business with reasonable pricing.”
  • “It was a good experience and I recommend MARS Environmental!”
    “I can't recommend this company enough.”
  • “Answered all our questions and were very professional.”
  • “Incredible and professional service, very reasonable pricing, and great explanation and report of results.”
  • “Thank you to your hard work, honesty, attentiveness and dedication to this work.”

People customers mention

  • Jeanine 18 reviews
  • Fire 5 reviews

praise complaint · found by our text analysis, Google review wording unchanged.

Recent reviews

Anne5 reviewsTotal 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 month ago★★★★★

My experience with them as always been professional, with integrity, and knowledgeable. I'm a real estate agent that has referred many clients.

Carol11 reviewsTotal 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 month ago★★★★★

they were very quick to set up an appointment, arrived right on time and their representative was knowledgeable and very pleasant. It was a good experience and I recommend MARS Environmental!!

Sue7 reviewsTotal 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. · Edited 2 months ago★★★★★

Extremely Professional and knowledgeable. On time for the appointment. Great Service!

ZacharyLocal Guide · 23 reviewsTotal 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. · 3 months ago★★★★★

Incredible and professional service, very reasonable pricing, and great explanation and report of results. Highly recommend for you mold testing needs!

Kathy2 reviewsTotal 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. · 4 months ago★★★★★

Answered all our questions and were very professional. Explained the process to us which helped us feel better about what the results could require us to do.

M1Local Guide · 21 reviewsTotal 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. · 4 months ago★★★★★

I highly recommend this quality, top notch business with reasonable pricing. Brooke made scheduling super easy and sets a gold standard for working with clients. Linzy came out for the inspection and she’s an expert through and through. She explained everything in detail and did a thorough job. Thank you M.A.R.S Environmental!

Photos

Customer reviews

4.9 ★★★★★ 104 reviews on Google · rating breakdown

Reviews from Google, shown as published (original wording, unedited).

Team members customers mention
Filter by topic — each topic is highlighted in the reviews in the same color
Anne Shaw5 reviewsTotal number of Google reviews Anne has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

My experience with them as always been professional, with integrity, and knowledgeable. I'm a real estate agent that has referred many clients.

Carol March11 reviewsTotal number of Google reviews Carol has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

they were very quick to set up an appointment, arrived right on time and their representative was knowledgeable and very pleasant. It was a good experience and I recommend MARS Environmental!!

Mark GuthrieLocal Guide · 24 reviewsTotal number of Google reviews Mark has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Very timely and extremely professional!

Sue Iten7 reviewsTotal number of Google reviews Sue has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Extremely Professional and knowledgeable. On time for the appointment. Great Service!

Christianna Wood7 reviewsTotal number of Google reviews Christianna has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

They were thorough and did a good job.

Zachary AtkinsLocal Guide · 23 reviewsTotal number of Google reviews Zachary has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Incredible and professional service, very reasonable pricing, and great explanation and report of results. Highly recommend for you mold testing needs!

Response from the owner · 3 months ago

Thank you so much for your kind words and recommendation! We truly appreciate you taking the time to share your experience. We're glad we could provide professional service, clear explanations, and a thorough report that gave you confidence in the results. It was a pleasure working with you, and we're here anytime you need mold testing or other environmental inspection services in the future!

Kathy Moorhead2 reviewsTotal number of Google reviews Kathy has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Answered all our questions and were very professional. Explained the process to us which helped us feel better about what the results could require us to do.

M1Local Guide · 21 reviewsTotal number of Google reviews M1 has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

I highly recommend this quality, top notch business with reasonable pricing. Brooke made scheduling super easy and sets a gold standard for working with clients. Linzy came out for the inspection and she’s an expert through and through. She explained everything in detail and did a thorough job. Thank you M.A.R.S Environmental!

Eric Dillon1 reviewTotal number of Google reviews Eric has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

i am writing to provide the highest recommendation for MARS environmental. I suffered an electrical fire that left my house in-tact but we knew that there was toxic residue left by this fire, our insurance company wanted to do simple cleaning - we turned to MARS and had them do a full test of our house. They were professional, timely and the report they produced was exhibit #1 in our battle with the insurance company. It is important to know that MARS reports the facts, it is not subjective or legal positioning and the facts fully supported a full tear down of our structure. If we had only cleaned, our health would have been compromised and that is what the insurance company wanted to do. Jeanine and the MARS team are very professional, responsible and i would give them my highest rating for any situations that involves assessing environmental chemical issues. Signed - very happy in Montana

Chris Kolbenschlag5 reviewsTotal number of Google reviews Chris has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Great job! Very professional and they did everything to ensure it was cleaned and that the area was contained. Great staff.

M.A.R.S. Environmental on Google Maps →

Business details