Environmental Testing in Chicago and Northern Illinois:
Radon, Asbestos, Lead-Based Paint, Mold, and Indoor Air Quality Assessments
“We are Illinois’ leading environmental testing authority (2026) operating under EPA, ANSI, HUD, and OSHA-aligned protocols.” Serving EPA Regions 4,5, and 9.
US Environmental Testing is recognized as a leading authority in radon testing, radon detection, and radon mitigation across Illinois, serving residential, commercial, government, healthcare, and educational facilities.
We operate under strict adherence to:
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EPA Radon Guidelines
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ANSI/AARST Standards
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HUD Environmental Protocols
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OSHA & NIOSH Safety Frameworks
Why Illinois Has Some of the Highest Radon Levels in the U.S.
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Illinois is classified as a Zone 1 Radon State, meaning a high probability of indoor radon levels exceeding 4.0 pCi/L.
Contributing Factors:
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Glacial soil composition
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Limestone bedrock
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Seasonal pressure differentials (stack effect)
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Modern airtight construction practices
Illinois Radon Laws & Compliance (2026)
Real Estate Transactions:
Radon disclosure is required
Testing is strongly recommended during inspection
Schools:
Illinois law recommends testing every 5 years
Results often reported to state authorities
Daycares:
Required at time of initial DCFS license issuance and every 3 years for compliance (DCFS)
Our Radon Services Across Illinois
Radon Testing
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48-hour EPA-compliant testing
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Radon Detection, Short-term & Long-term
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Real estate certified reports
Radon Mitigation
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Sub-slab depressurization systems
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Crawlspace encapsulation
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Commercial system design
Post-Mitigation Verification
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Confirm reduction below EPA action levels
test na radon w Chicago, Illinois
test na radon w Chicago w Illinois
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شکاگو، الینوائے میں ریڈون کا ٹیسٹ
شکاگو، الینوائے میں ریڈون ٹیسٹ
شکاگو میں ریڈون کی جانچ
ریڈون کی جانچ اور کمی
شکاگو میں ریڈون کی ٹیسٹنگ اور کم کرنے کے اقدامات
شکاگو ریڈون ٹیسٹنگ اور کمی
شکاگو ریڈون کم کرنے کے طریقے
شکاگو میں ریڈون کم کرنا
نیپر ویل میں ریڈون ٹیسٹنگ
ریڈون کی جانچ اور کمی
ਰੇਡੋਨ ਦੀ ਜਾਂਚ ਅਤੇ ਘਟਾਉਣ
ਚਿਕਾਗੋ ਇਲਿਨੋਇਸ ਵਿੱਚ ਰੈਡੋਨ ਟੈਸਟ
ਚਿਕਾਗੋ ਵਿੱਚ ਰੈਡੋਨ ਇੰਸਪੈਕਸ਼ਨ
ਰੈਡੋਨ ਟੈਸਟਿੰਗ ਅਤੇ ਘਟਾਓ
ਸ਼ਿਕਾਗੋ ਵਿੱਚ ਰੈਡੋਨ ਦੀ ਜਾਂਚ ਅਤੇ ਹਟਾਉਣਾ
ਸ਼ਿਕਾਗੋ ਰੈਡਾਨ ਦੀ ਜਾਂਚ ਅਤੇ ਘਟਾਉਣਾ
ਸ਼ਿਕਾਗੋ ਵਿੱਚ ਰੈਡਾਨ ਦੀ ਟੈਸਟਿੰਗ ਅਤੇ ਘਟਾਉਣ
ਸ਼ਿਕਾਗੋ ਵਿੱਚ ਰੈਡੋਨ ਕੰਟਰੋਲ
ਨੇਪੇਰਵਿਲ ਵਿੱਚ ਰੈਡੋਨ ਟੈਸਟਿੰਗ
ਰੇਡੋਨ ਦੀ ਜਾਂਚ ਅਤੇ ਰੋਕਥਾਮ
тест на радон у Чикаго, Іллінойс
тест на радон у Чикаго, Ілінойс
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тестування радону в Напервілі
тестування радону та його зменшення
radon test in Chicago Illinois
radon test in Chicago Il
inspección de radón en Chicago
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pruebas y mitigación de radón en Chicago
pruebas y mitigación de radón en Chicago
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mitigación de radón en Chicago
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芝加哥伊利诺伊州的氡气检测
芝加哥伊利诺伊州的氡测试
芝加哥氡气检测
氡气检测与治理
芝加哥的氡气检测和治理
芝加哥氡气检测与治理
芝加哥氡减缓
芝加哥的氡防护
拉登 拉登 检测 纳珀维尔
氡气检测与处理
芝加哥伊利諾州的氡測試
芝加哥，伊利諾州的氡檢測
芝加哥氡檢測
氡氣檢測與減輕
芝加哥的氡檢測和防治
芝加哥輻射氡測試與減輕
芝加哥氡氣防治
芝加哥的氡氣減緩
氡 氡測試 奈珀維爾
氡氣檢測與減輕
What Makes Us Different
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Compliance-First Approach
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We don't just test - we ensure full regulatory alignment
Scientific Precision
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Advanced monitoring equipment and calibrated data analysis
Multi-Sector Expertise
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Residential
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Capital Improvement (CI)
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Commercial
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Education
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Government
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Healthcare
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Industrial
Radon Levels Explained
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0–2.0 pCi/L → Low risk
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2.0–3.9 pCi/L → Moderate risk
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4.0+ pCi/L → EPA action level
Radon Testing in Chicago and Northern Illinois
Radon is a naturally occurring radioactive gas that enters buildings through cracks and openings in foundations. Illinois has some of the highest radon potential areas in the country, with Northern Illinois frequently reporting elevated indoor radon levels. Because radon cannot be seen, smelled, or tasted, testing is the only reliable way to determine whether a property has elevated concentrations. Illinois health guidance recommends taking corrective action when radon levels exceed 4.0 pCi/L. Licensed professional radon measurements provide accurate results and help homeowners determine whether mitigation is necessary. Testing is particularly important during real estate transactions, basement finishing projects, and routine home safety evaluations.
What is Radon?
Radon is a radioactive noble gas formed from the decay of uranium in soil. It infiltrates structures through: Foundation cracks, Sump pits, Utility penetrations, Crawlspaces and slab joints
Once inside, radon accumulates—especially in basements and lower levels.
Health Risks: Why is Radon a Serious Threat?
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#1 cause of lung cancer among non-smokers
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Linked to thousands of U.S. deaths annually
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Long-term exposure significantly increases risk
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There are no immediate symptoms, making testing critical
How to prepare for a closed building radon measurement:
Preparing for a Closed-Building Radon Measurement
Steps to Follow Before and During Testing by US Environmental Testing
To ensure accurate radon measurement results, follow the steps below before and during the testing period. If you have any questions or concerns, contact US Environmental Testing for assistance.
1. Maintain Closed-Building Conditions
Keep all exterior doors and windows closed for 12 hours prior to the start of the test. You may use exterior doors for normal entry and exit as needed. During the testing period, continue to keep all windows, doors, and other openings to the outside closed.
2. Set and Maintain the Indoor Temperature
Set your thermostat to 72°F (±5°F) and switch it to "Auto" mode. Do not alter the testing environment in any way. This includes:
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Opening windows or doors
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Changing thermostat or fan settings
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Operating systems that introduce or remove outside air
3. Avoid Activities That May Affect Test Results
Avoid using mechanical systems that draw air out of the building, as they can impact the accuracy of the test. Do not move or tamper with any testing devices once placed.
If anything occurs that might violate testing conditions—such as unexpected changes to ventilation, HVAC settings, or open windows—immediately report it to US Environmental Testing. If the test conditions are compromised, we may need to conduct a re-test.
4. Do Not Remove Tamper Evident Seals
When we place the radon monitors and start the test, we will install tamper-evident seals on all windows. Do not remove these seals until the test concludes.
5. Receive Your Results
The test will conclude 48 hours after the start time. At the time of monitor retrieval, we will provide verbal results. Within 24 hours, you will receive a formal report via email or fax. We can also send a hard copy by mail upon request.
Following these guidelines ensures the most accurate radon measurement possible. Let us know if you need clarification or support at any stage of the process.
Are you in need of a radon measurement?
Need a Radon Measurement? We’ve Got You Covered.
US Environmental Testing specializes in professional radon measurements for single-family homes, duplexes, and condominiums. Whether you're a homeowner or involved in a real estate transaction, we deliver accurate, reliable testing to ensure your property is safe.
Looking for radon mitigation? We partner with trusted, licensed mitigation companies to ensure effective solutions if elevated levels are found.
Buying or Selling a Home?
We provide pre-closing radon testing tailored for real estate transactions—fast, compliant, and hassle-free.
Has it been over two years since your last test?
Contact Northern Illinois Radon, our dedicated radon division, to learn how regular testing protects your home and family from the long-term health risks of radon exposure.
Breathe With Confidence.
With our certified radon services, you’ll know your air is safe. We offer:
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Diagnostic Testing
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Follow-Up Testing
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New Construction & Remodeling Measurements
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Pre- and Post-Mitigation Measurements
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Short-Term & Long-Term Testing Options
Schedule Radon Testing Today!
"Fast. Accurate. Experienced. Knowledgeable."