California Libraries Now Offer EcoBlu Radon Monitors Through CDPH

Announced on December 12, 2025, this statewide initiative aims to make radon awareness and home testing more accessible. With 600 EcoBlu monitors distributed across 21 public library systems and 360 libraries participating, the program helps more Californians take an informed approach to indoor air quality.

What Is the California Library Radon Monitor Program?

The California Indoor Radon Program has partnered with public libraries to give residents access to digital radon detection technology at no cost. Supported through the U.S. Environmental Protection Agency's State Indoor Radon Grant (SIRG), the initiative helps reduce financial and practical barriers to radon testing.

Participating libraries serve communities across the state, including Shasta, San Bernardino, Riverside, Humboldt, and Mendocino counties.

Residents can borrow an EcoBlu monitor through their local library's lending service, following a process similar to checking out a book. This approach makes it easier for households to explore indoor radon levels without purchasing a detector first.

The initiative also highlights the important role public libraries can play in sharing environmental health information and connecting communities with useful resources.

Looking for a free radon monitor in California? Start by contacting your local public library or checking its online catalog to determine whether an EcoBlu device is available and review its borrowing requirements.

Why Is Radon Testing Important for California Homes?

Radon is a naturally occurring radioactive gas produced by the breakdown of uranium in soil and rock. Because it is colorless and odorless, people cannot detect it through their senses.

The gas can enter buildings through foundation cracks and other openings. When it accumulates indoors, long-term exposure increases the risk of lung cancer. The U.S. Environmental Protection Agency (EPA) identifies radon as a major cause of lung cancer among people who do not smoke.

Radon levels can vary significantly between buildings, even in the same neighborhood. Factors such as local geology, construction, foundation design, and ventilation can influence indoor concentrations.

That is why testing is important regardless of where a property is located. California homeowners, renters, and families should not assume their indoor environment is free from radon simply because they live outside an area commonly associated with elevated levels.

Testing provides useful information that can help residents decide whether additional evaluation or radon reduction measures may be necessary.

How Does the EcoBlu Digital Radon Monitor Work?

The Ecosense EcoBlu is designed to make indoor radon monitoring straightforward. According to the product information, the device uses ion-chamber detection technology and provides digital readings without requiring a Wi-Fi connection.

Its key features include:

• Real-time monitoring: Readings update every 10 minutes, allowing users to observe changes in indoor radon concentrations.
• Simple operation: The plug-and-play design makes the device accessible to users without specialized technical knowledge.
• Multiple reporting periods: Users can review daily, weekly, and monthly averages, along with longer-term trends.
• No Wi-Fi requirement: The monitor can operate without connecting to a wireless network.

These features help users understand both short-term fluctuations and broader patterns in their indoor radon levels.

However, a reading taken over a short period should not automatically be treated as a definitive measurement of a home's long-term average. Follow the device instructions and consult official radon guidance when interpreting results or deciding whether further testing is needed.

How to Borrow a Free Radon Monitor From a California Library

If you want to check your home's radon levels, the library lending program offers a practical starting point.

Follow these steps:

1. Find a participating library. Contact your local public library or search its online catalog for an EcoBlu radon monitor. Availability may differ between locations.
2. Confirm borrowing requirements. Ask about library membership, loan periods, reservations, and any instructions for returning the device.
3. Set up the monitor. Follow the manufacturer's instructions for placement and operation. Choose an appropriate indoor location and avoid placing the device where it may be disturbed or exposed to unsuitable conditions.
4. Monitor the readings. Allow the device to collect measurements and review its readings and averages according to the manufacturer's guidance.
5. Determine your next steps. If the results suggest elevated radon levels, consult the EPA or CDPH for guidance on follow-up testing and appropriate mitigation measures.

This process gives residents a practical way to learn about radon without the initial expense of purchasing a monitoring device.

What Should You Do if Your Radon Levels Are High?

Understanding your readings is just as important as obtaining them.

The EPA recommends reducing indoor radon when levels reach 4 picocuries per liter (pCi/L) or higher. It also advises homeowners to consider reducing levels between 2 and 4 pCi/L because no level of radon exposure is known to be completely risk-free.

If your EcoBlu monitor indicates elevated levels:

1. Review the manufacturer's guidance to understand the measurement and monitoring period.

2. Consult official EPA or CDPH recommendations about follow-up testing.

3. Contact a qualified radon mitigation professional if elevated levels are confirmed or further evaluation indicates that corrective action is appropriate.

4. After mitigation, test again as recommended to check whether the measures have reduced indoor radon concentrations.

A digital monitor can provide valuable information, but it should not replace professional advice when elevated readings require further investigation.

For authoritative guidance, visit the EPA's radon resource center.

How Public Libraries Are Expanding Radon Awareness

The California program demonstrates how community institutions can make environmental health resources more accessible.

As noted by Dale Parks, senior environmental scientist with the CDPH Indoor Radon Program, access to testing resources can influence participation and outcomes. The initiative draws on the experience of library-based radon monitor distribution programs in other states, including Kentucky.

By making devices available through trusted local institutions, the program helps residents explore an otherwise overlooked indoor air quality concern. It also provides an opportunity for libraries to share educational resources and encourage informed conversations about home safety.

The monitors are listed in WorldCat, a large international library catalog, helping library staff and patrons locate participating resources.

Frequently Asked Questions

Can California residents borrow an EcoBlu monitor for free?

Yes. Under the announced CDPH initiative, participating public libraries lend EcoBlu radon monitors to residents at no cost. Contact your local library to confirm availability and borrowing requirements.

Do I need Wi-Fi to use the EcoBlu monitor?

No. The EcoBlu's stated features include operation without a Wi-Fi connection. Follow the manufacturer's instructions for setup and reading measurements.

Is one radon reading enough to determine whether my home is safe?

Not necessarily. Radon concentrations fluctuate, and a short-term reading may not represent a home's long-term average. Follow official testing guidance and seek professional advice when results are elevated.

Take the Next Step Toward Better Indoor Air Quality

The California library radon monitor program gives residents a convenient opportunity to learn more about an invisible indoor environmental risk. By borrowing a free EcoBlu monitor, households can begin understanding their indoor radon levels and make more informed decisions about further testing.

If you live in California, contact your local public library to ask whether an EcoBlu monitor is available. For additional information about digital radon monitoring, explore Ecosense and consult official public health resources for guidance on interpreting results and reducing radon exposure.

Start with awareness, use reliable measurements, and take appropriate action when your results indicate a potential concern.