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Verified Reviews for Radon Detection And Reduction pros in Shasta, CA

*The Angi rating for Radon Detection And Reduction companies in Shasta, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.

*The HomeAdvisor rating for Radon Detection And Reduction companies in Shasta, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.

Last update on January 21, 2026

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Avatar for Environmental Testing & Research Laboratories, Inc

Environmental Testing & Research Laboratories, Inc

4.85(
347
)

Environmental Testing & Research Laboratories, Inc

4.85(
347
)
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018

Avatar for Turtle Clan Global

Turtle Clan Global

No reviews yet

Turtle Clan Global

No reviews yet
25 years of experience

Turtle Clan has been in business since 2001, and is the premier environmental testing and consulting firm in the New York and Connecticut area. Turtle Clan was the first company to offer unbiased 3rd party testing services ONLY, so there wouldn't be any conflicts of interest. The Turtle Clan team brings over 200 years combined intellectual capital to our clients needing the assurance of competent experts who follow the ACGIH, IAQA, ACAC, The Clean Trust, OSHA, EPA, and AIHA recommendations for the assessment of indoor and outdoor environments for toxic and hazardous contamination. Our experience enables us to deliver knowledgeable and price sensitive solutions for many diverse environmental conditions. We are equipped to serve: Federal, State and Municipal governments, Educational Institutions, Realtors, Attorneys, Consulting Engineering Firms, Health Care Facilities, Hotels, Property Managers, Homeowners, and the Insurance Industry.

Turtle Clan has been in business since 2001, and is the premier environmental testing and consulting firm in the New York and Connecticut area. Turtle Clan was the first company to offer unbiased 3rd party testing services ONLY, so there wouldn't be any conflicts of interest. The Turtle Clan team brings over 200 years combined intellectual capital to our clients needing the assurance of competent experts who follow the ACGIH, IAQA, ACAC, The Clean Trust, OSHA, EPA, and AIHA recommendations for the assessment of indoor and outdoor environments for toxic and hazardous contamination. Our experience enables us to deliver knowledgeable and price sensitive solutions for many diverse environmental conditions. We are equipped to serve: Federal, State and Municipal governments, Educational Institutions, Realtors, Attorneys, Consulting Engineering Firms, Health Care Facilities, Hotels, Property Managers, Homeowners, and the Insurance Industry.

Radon Detection and Reduction questions, answered by experts

The natural breakdown of uranium in soil, rock, and water can cause radon to appear in a home. The gas seeps into homes through cracks in foundations, walls, or floors, as well as through gaps around pipes or construction joints. Radon levels are influenced by soil composition, building materials, and ventilation. Poorly sealed or airtight homes can trap radon, allowing it to accumulate.

Long-term exposure increases lung cancer risks. Prolonged homestay individuals and smokers encounter heightened vulnerability and exposure concerns.

Results from radon testing usually take a week to process after the test period ends, with expedited services sometimes available for urgent cases.

Radon is a colorless, odorless gas that can cause lung cancer; testing ensures safe indoor air quality.

Radon testing costs around $450 on average, but you could pay between $150 and $800 for testing, depending on a few factors. The size of your house is one of the most significant cost factors, as your radon professional will have to set up additional tests for homes with larger footprints. The type of test can also have an impact on the cost. Finally, some radon testing companies will include a recommended protocol for radon mitigation, while others might charge $50 to $100 extra.

The Shasta, CA homeowners’ guide to radon detection and reduction services

From average costs to expert advice, get all the answers you need to get your job done.

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