Top 10 Sewage Cleanup & Biohazard Companies in Washington (2026)

Published: May 30, 20262026623 words3 min read

Key Takeaways

10 sewage & biohazard firms in Washington qualified for this ranking based on verified data from public sources (BBB, Google, IICRC, EPA, Yelp, Angi, HomeAdvisor).
The top firm in this ranking is 24ResTech, with a MetaScore of 100/100.
Every firm here carries at least one publicly verifiable signal — no firm appears in this article without a cited source.
This list is filtered to firms that explicitly offer sewage & biohazard services. Multi-discipline firms appearing here have that service confirmed on their website or in their public certifications.
Methodology is published in full at restorationindex.com/methodology. Firms can request a correction at restorationindex.com/contact.

Sources cited in this article: Better Business Bureau, Institute of Inspection, Cleaning and Restoration Certification, U.S. Environmental Protection Agency, Google, Yelp, Angi, HomeAdvisor, and Restoration Index.

Based on aggregated public-source data from BBB Business Profiles, Google Business Profile reviews, IICRC certified member directory, EPA Lead-Safe registry, Yelp, Angi Super Service Award lists, and HomeAdvisor recognition, here are the top-ranked sewage & biohazard firms in Washington. Each firm receives a 0-100 Restoration Index MetaScore weighted across 9 sources.

Top 10 Sewage Cleanup & Biohazard Companies in Washington — Ranked by Multi-Source MetaScore

24ResTech (Tacoma, WA) — MetaScore 100/100. BBB A+ accredited. founded 1989. Read the full review.
Paul Davis of Tacoma (Tacoma, WA) — MetaScore 84/100. IICRC certified. founded 1966. Read the full review.
SERVPRO of Bellevue (Bellevue, WA) — MetaScore 83/100. 5.0-star Google rating across 20 reviews. BBB A+ accredited. Read the full review.
Roto-Rooter Plumbing & Water Cleanup Spokane (Spokane, WA) — MetaScore 83/100. 4.7-star Google rating across 1,300 reviews. BBB A+ accredited. IICRC certified. founded 1935. Read the full review.
American Standard Restoration (Tacoma, WA) — MetaScore 83/100. BBB A+ accredited. founded 2020. Read the full review.
Rainbow Restoration of Spokane (Spokane, WA) — MetaScore 78/100. 4.8-star Google rating across 157 reviews. BBB A+. IICRC certified. founded 2011. Read the full review.
ServiceMaster by Compass (Spokane, WA) — MetaScore 78/100. 4.9-star Google rating across 427 reviews. BBB A+. IICRC certified. founded 2017. Read the full review.
Environment Control of Spokane Restoration (Spokane, WA) — MetaScore 77/100. 4.8-star Google rating across 48 reviews. BBB A+ accredited. founded 1963. Read the full review.
PuroFirst of Eastern Washington (Spokane, WA) — MetaScore 74/100. 4.8-star Google rating across 81 reviews. BBB A+ accredited. founded 1994. Read the full review.
SERVPRO of Gig Harbor / North Tacoma (Tacoma, WA) — MetaScore 74/100. 4.5-star Google rating across 32 reviews. founded 1967. Read the full review.

Top sewage & biohazard firms in Spokane

Roto-Rooter Plumbing & Water Cleanup Spokane leads Spokane with a MetaScore of 83/100 and 1,300 Google reviews. Other top-ranked firms in Spokane include Rainbow Restoration of Spokane (MetaScore 78/100), ServiceMaster by Compass (MetaScore 78/100), and Environment Control of Spokane Restoration (MetaScore 77/100).

Top sewage & biohazard firms in Tacoma

24ResTech leads Tacoma with a MetaScore of 100/100. Other top-ranked firms in Tacoma include Paul Davis of Tacoma (MetaScore 84/100), American Standard Restoration (MetaScore 83/100), and SERVPRO of Gig Harbor / North Tacoma (MetaScore 74/100).

Frequently Asked Questions

How is the Restoration Index MetaScore calculated?

The MetaScore is a weighted average of nine normalized component scores: Google Business Profile reviews (25%), BBB rating + complaint history (20%), IICRC certification (12%), EPA Lead-Safe registry (8%), years in business (10%), Yelp reviews (10%), Angi Super Service Award (5%), HomeAdvisor Top Rated (5%), and regional industry awards (5%). Firms with sparse data have weights redistributed proportionally across the sources we did find. Full methodology at restorationindex.com/methodology.

Who is the top-ranked sewage cleanup & biohazard company in Washington?

As of May 2026, 24ResTech ranks #1 in Washington for sewage cleanup & biohazard with a MetaScore of 100/100. The full ranking and per-firm breakdowns appear below.

How often is this list updated?

Firm-level data (reviews, BBB ratings, certifications) is refreshed every 30 to 90 days depending on the source. Awards and recognition fields refresh annually. The "Last refreshed" date below the article header reflects the most recent data refresh for this article.

Can firms pay to be included or ranked higher?

No. Restoration Index does not accept paid placement. The MetaScore is calculated identically for every firm in the index, whether or not they have any commercial relationship with Pleiades Consultancy (the publisher of this site). The methodology is published in full so firms can audit how the calculation works.

What if a firm I trust is missing from this list?

Coverage is rolling out city by city. If a firm meets our inclusion criteria (operating in the named region, offering sewage cleanup & biohazard services, with at least one verifiable public signal), they will appear in future refreshes. Firms can also reach out via restorationindex.com/contact to request inclusion.

Sources & Further Reading

Every claim in this article is backed by at least one of the following third-party sources. Linked out to the publisher so you can audit the original.