Analyzing 9,108,2729.1M ReviewsFor 25,80125.8K Experts
We graded 9 companies on seven things customers actually report: satisfaction, reliability, workmanship, value, momentum, track record and how owners handle complaints.
From 20,736 Google reviews of 184 top-rated hazardous material removal nationwide; 9 of them in Tigard, OR. Updated November 9, 2026.
Pick the job — we re-rank companies by how customers rated that exact job.
Experts Score 0–100Experts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. and a letter grade per factor (A = top 20% of hazardous material removal).
| # | Company | ScoreExperts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. | FactorsFactor grades, in orderSatisfaction (54%): Recency-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.Reliability (24%): How 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.Craft & service (0%): Google 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.Value (14%): Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Momentum (0%): Penalises 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.Replies to reviews (7%): How 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.One letter per factor score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = below 20. | ★Google star rating as shown on Google Maps. | Typical billMedian bill customers of this company reported in their reviews (needs 3+ priced reviews). |
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| 1 |  M&M ABATEMENT & RESTORATION LLCTigard, OR | A 97How 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 69%98+67.8Reliability 31%95+29.2Experts Score= 97Not enough data for value, replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA––A– | 5.00 | — |
| 2 |  Mold Testing Services of OregonTigard, OR | A 95How 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 55%96+52.4Reliability 24%95+23Value 14%97+13.7Replies to reviews 7%90+6.4Craft & service penalty99−0.1Experts Score= 95Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.96 | — |
| 3 |  NW Environmental Solutions | Mold & Asbestos RemovalTigard, OR | A 91How 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 69%92+63.7Reliability 31%89+27.4Experts Score= 91Not enough data for value, replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA––A– | 4.92 | — |
| 4 |  AccuGuard Environmental®Tigard, OR | A 91How 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 69%91+63Reliability 31%92+28.3Experts Score= 91Not enough data for value, replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA––A– | 4.90 | — |
| 5 |  Alpha Environmental ServicesTigard, OR | B 78How 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 55%77+42Reliability 24%72+17.5Value 14%100+14.1Replies to reviews 7%83+5.9Craft & service penalty92−0.8Momentum penalty89−1.1Experts Score= 78Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | BBAAAA | 4.80 | — |
| 6 |  Atlas Labs, Inc.Tigard, OR | B 78How 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 55%83+45.3Reliability 24%75+18.2Value 14%93+13.2Replies to reviews 7%31+2.2Craft & service penalty97−0.3Experts Score= 78Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | ABAAAD | 4.82 | — |
| 7 |  Certified Indoor EnvironmentalTigard, OR | B 71How 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 55%81+44.2Reliability 24%51+12.4Value 14%100+14.1Replies to reviews 7%48+3.4Craft & service penalty73−2.7Experts Score= 71Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | ACBA–C | 4.89 | — |
| 8 |  Pure EnvironmentalTigard, OR | B 65How 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 55%66+36Reliability 24%41+9.9Value 14%100+14.1Replies to reviews 7%100+7.1Craft & service penalty97−0.3Momentum penalty77−2.3Experts Score= 65Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | BCAABA | 4.73 | — |
| 9 |  Eurofins Built Environment Testing- PortlandTigard, OR | C 50How 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%53+33.7Reliability 28%74+20.9Replies to reviews 8%47+3.9Momentum penalty20−8Experts Score= 50Not enough data for value; its weight is shared by the others.Grade C: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | CB––DC | 4.59 | — |
What customers paid, from the price Google asks reviewers to report.
| Job | Low25th percentile: 1 in 4 customers paid less than this. | TypicalMedian of the bill customers reported in their Google review (Google asks reviewers for a price range; we use the middle of each range). | High75th percentile: 1 in 4 customers paid more than this. | FairOf customers who rated the price, the share who chose “Great price” or “Reasonable” rather than “Overpriced”. |
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How the 9 hazardous material removal we rated in Tigard, OR compare, and what customers praise most.
A = score 80+, F = below 20.
Average stars per company.
Share of Google review highlights.
All price verdicts left with reviews.
Share calling it great / reasonable / overpriced.
Satisfaction (54%) — Recency-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.
Reliability (24%) — How 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.
Craft & service (penalty, up to −10) — Google 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.
Value (14%) — Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.
Momentum (penalty, up to −10) — Penalises 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.
Replies to reviews (7%) — How 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.
The 9 best-rated hazardous material removal in Tigard, OR average 4.8★ on Google across 1,465 reviews. Mold Testing Services of Oregon has the top rating (5.0★), and Alpha Environmental Services has the most reviews (593). Updated November 3, 2026.
9 companies that meet our bar: rated 4.5★ or higher on Google, with a meaningful review history (1,465 reviews combined) and currently operating. Request a call back and the company will phone you directly.
“Had a fantastic experience with this company. Garret is very knowledgeable. He promptly answered all my questions and concerns. His testing and sample collection was extremely thorough and punctual. I was very…” — Google review
“Project Manager Freddy Rodriguez came out to inspect my attic. He was very knowledgeable and was able to assess the ventilation issues and condition of the roofing sheathing. I appreciate his expertise.” — Google review
“Alpha did an excellent job at resolving a mold issue on our older home. They were prompt, professional and provided quality work. And Chris went above and beyond, taking care of roof sealing issues that were…” — Google review
“Nathan and Antonio did an asbestos abatement and soffit removal on our eves and they did a great job. They were on time, professional finished on time and everything was cleaned up nice. Would absolutely recommend.” — Google review
“Josh was very courteous and professional. Their response time was amazing and Josh completed the work in very short order. I would highly recommend AccuGuard to my family and friends.” — Google review
“Atlas was fantastic. Had a tight turn around and even though their same day time was 2pm (and I was late), they showed grace and took care of me. Thanks Atlas!” — Google review
“They were great. We moved into a new home this year, and soon found out that one of the basement rooms had a lingering cat urine odor. They handled testing for asbestos, removing soiled drywall, running an ozone…” — Google review
“Wonderful team and so very knowledgeable. Amazing follow through with pictures of every step and answering questions. Excellent price for services. Definitely worth calling. Will use them again for another home.” — Google review
“Seriously the best place to go for asbestos testing in the Portland metro area! Multiple turnaround options and good prices. Cannot recommend enough.” — Google review
We scan Google Maps for hazardous material removal service listings in and around Tigard, keep only open businesses whose main category matches the service, and require a Google rating of at least 4.5 from at least 20 reviews. Companies are ordered by a confidence-weighted score that balances rating and review volume. We do not accept payment for placement.
Mold Testing Services of Oregon has the highest Google rating on our Tigard list: 5.0 out of 5 from 327 reviews (as of November 3, 2026).
Alpha Environmental Services has the most Google reviews among the companies listed here: 593, with a 4.8★ average.
Only open Tigard-area businesses whose Google category matches the service, rated at least 4.5★ from at least 20 Google reviews. They are ordered by a confidence-weighted score of rating and review volume. Placement is never paid.
Also in Tigard: Car Wash Services · Towing Services · Mold Inspectors
Analyzing 9,108,2729.1M ReviewsFor 25,80125.8K Experts