Radon Testing in Manitou Springs, CO | InspectandTest
Manitou Springs sits in EPA Radon Zone 1, the agency’s highest-risk category, where the predicted average indoor radon level meets or exceeds the 4 pCi/L action threshold. This historic Victorian spa town at the foot of Pikes Peak rests on the granite of the Pikes Peak batholith, a uranium-bearing rock that drives radon strongly, and its old hillside homes with crawlspaces and stone foundations offer the gas many entry paths. Radon is a colorless, odorless radioactive gas and the second-leading cause of lung cancer after smoking. This page explains how radon testing manitou springs homeowners should plan, why the local geology demands it, and what testing costs. This summary reflects EPA and CDPHE guidance current as of 2026; consult a certified professional for testing decisions.
Part of our Radon Levels guide — start there for the full picture →
Radon testing in Manitou Springs: what to know
Radon testing measures the gas that has accumulated indoors in picocuries per liter (pCi/L). The EPA recommends action at or above 4 pCi/L, and because Manitou Springs lies in Zone 1 over uranium-bearing granite, a meaningful share of local homes test at or above that line. Two neighboring Victorian homes can read very differently depending on foundation type, cracks, and soil contact, so the only way to know your number is to test your own home.
Short-term tests of 2 to 7 days suit real-estate timelines, while long-term tests of 90 days or more average seasonal swings for a fuller exposure picture. For the underlying science and the device types involved, our plain-language radon guide for Front Range homeowners walks through both approaches in detail.
The geology here makes the house-to-house variation especially relevant. Radon depends on the uranium content of the rock and soil beneath a foundation, and the Pikes Peak granite batholith that Manitou Springs sits on is a strong radon source. Add the area’s many old homes with crawlspaces, stone foundations, and slab additions, each with its own entry pathways, and readings can swing widely from one historic property to the next. A neighbor’s clean test tells you nothing about your own home.
Radon also changes over time, so a clean test years ago does not guarantee a clean home today. An old home that gains a finished basement room, a sealed crawlspace, or a new heating system can see its radon level shift as airflow and pressure change. EPA guidance is to re-test every couple of years and after any major change. For a Manitou Springs household that recently renovated a lower level or updated its heating, a fresh measurement is the only reliable way to know the current level.
Why Manitou Springs homes need radon testing
Geology is the dominant driver. Radon comes from the decay of uranium in rock and soil, and the Pikes Peak granite batholith beneath Manitou Springs is rich in the kind of crystalline rock that releases radon readily. This is why the whole El Paso County Pikes Peak region sits firmly in Zone 1, and why the gas is a baseline concern for essentially every home in town regardless of age or style.
The housing stock shapes how radon enters. The dominant late-1800s and early-1900s Victorian and craftsman homes often sit over crawlspaces, stone or rubble foundations, and old slabs, each offering more entry pathways than a modern poured basement. Cold winters at this 6,400-foot elevation keep homes sealed for months while heating systems create slight negative pressure that draws soil gas up through these openings. A lower-level room used daily becomes both the most rock-contacted space and a place where people spend time, the worst-case combination for exposure.
The hillside, ground-coupled nature of these homes reinforces the risk. Houses built into steep slopes have substantial below-grade rock and soil contact along their uphill sides, and the crawlspaces beneath many of them breathe soil gas directly into the structure. Whether a home is a Historic District Victorian or a hillside craftsman in Manitou Heights, the granite-driven radon risk is consistent, which is why testing is treated as a default here rather than an optional step.
What a Manitou Springs radon test covers
A professional test places a calibrated continuous radon monitor or a passive device in the lowest livable level, often a ground-floor room or a finished lower level, under closed-house conditions. The tester documents placement and the closed-house window so the result holds up if it feeds a real-estate negotiation.
Closed-house conditions
For at least 12 hours before and during a short-term test, windows and exterior doors stay closed except for normal entry. This keeps a breezy mountain afternoon or canyon airflow from artificially lowering the reading. If a test comes back at or above 4 pCi/L, the next step is mitigation, detailed in our guide to radon mitigation in Manitou Springs.
Continuous monitors versus passive kits
A continuous radon monitor logs hourly readings, so it can show whether a window was opened mid-test or whether levels spiked overnight, evidence that protects a buyer from a tampered result. Passive devices like charcoal canisters average exposure and mail to a lab at lower cost. For a Manitou Springs home sale, the continuous monitor’s tamper detection and hour-by-hour record make it the preferred tool, while a passive kit left in place for months gives an owner a representative annual average.
Radon testing cost in Manitou Springs
A professional short-term radon test in the Manitou Springs and El Paso County market typically runs about $135 to $250. A do-it-yourself kit costs roughly $15 to $40 plus lab fees, and CDPHE periodically offers discounted kits to Colorado residents. Bundled into a pre-purchase home inspection, radon testing often adds just $100 to $175 rather than a separate trip charge.
Long-term kits sit at the low end on price but tie up months. For a transaction, the documented short-term professional test is standard because it fits inspection deadlines and produces a defensible closed-house result that can support a mitigation request.
Weigh the cost against the protection. The EPA links thousands of lung-cancer deaths a year to radon, and the Pikes Peak granite under Manitou Springs puts local exposure risk among the highest in the state. A $200 test that catches a 7 pCi/L lower-level reading lets a household install a roughly $1,500 mitigation system and cut exposure substantially. Skipping the test leaves the risk invisible for as long as the family lives there, a poor trade for the modest cost of measuring in a strong-source area.
Where to place the device
Placement determines whether the result reflects real exposure. The device belongs in the lowest level that is or could become living space, set about 20 inches or more above the floor, away from exterior walls, drafts, direct sun, and crawlspace openings or drains. In a typical Manitou Springs home that means the lowest occupied room rather than an unfinished crawlspace corner. Testing a space no one occupies understates the exposure a household actually experiences.
Conditions during the test matter as much as location. A short-term test needs closed-house conditions for at least 12 hours before and throughout, so windows and exterior doors stay shut except for normal entry. A professional follows EPA placement and closed-house protocol precisely, because a result that drives a mitigation decision or a purchase negotiation has to be defensible against scrutiny.
Manitou Springs adds a wrinkle worth planning for: many homes here are short-term rentals, which complicates the closed-house requirement. A rental cycling guests in and out, with doors opening and windows cracked between stays, cannot meet the steady closed-house conditions a valid short-term test needs. For these properties, scheduling the test during a vacancy and arranging for the home to stay closed for the full period, or using a longer-duration continuous monitor that averages over several days, produces a far more reliable number than a snapshot taken during active turnover. An owner who manages the home’s use during the test gets a result they can actually trust.
Manitou Springs regulations and disclosure
Colorado requires radon disclosure in residential real-estate transactions, and the Seller’s Property Disclosure asks sellers to report known radon results and any existing mitigation system. CDPHE runs the state radon program, references the 4 pCi/L EPA action level, and offers discounted kits to residents. Colorado does not license home inspectors, so for any test tied to a sale, confirm the tester follows recognized national measurement protocols rather than assuming a license guarantees competence.
Disclosure shapes negotiations both ways. A Manitou Springs seller who has tested and mitigated can offer a clean post-mitigation result as reassurance, while a seller who has never tested leaves the buyer to discover the number during the contingency, often resulting in a mitigation credit. Buyers in this strong-source Zone 1 area should not waive radon testing to sweeten an offer; the modest cost of the test and fix is small against the long-term health stakes of an untreated lower level.
Neighborhoods and areas served
Radon turns up across Manitou Springs regardless of neighborhood: the Victorian and craftsman homes of the Downtown Historic District, the hillside homes of Crystal Hills, Crystal Park, and Manitou Heights, and properties built into the slopes throughout town. Service typically extends to adjacent Colorado Springs, Cascade, Green Mountain Falls, and Old Colorado City, all on the same Pikes Peak granite and within the Zone 1 footprint where elevated readings are common.
Because the granite geology that drives radon underlies the whole Pikes Peak area, the Zone 1 designation does not stop at a town line. A Historic District Victorian and a hillside home in Manitou Heights face the same rock-source risk. Wherever the home sits within Manitou Springs, treating radon as a default test rather than an optional add-on reflects the reality that the entire area sits over a strong radon source. Owners coordinating in the broader region can also review our hub on radon testing in El Paso County.
How to choose a Manitou Springs radon testing provider
Ask whether the provider uses a calibrated continuous radon monitor and follows EPA or AARST protocols. A good tester documents closed-house conditions, device placement, and test duration so the result stands up in a sale. Bundling radon with a full home inspection is efficient and gives buyers one coordinated report on both the structure and the soil-gas risk.
Confirm the monitor’s calibration is current and, for a purchase, ask the provider to place and retrieve the device themselves rather than handing you a kit, since a tester-administered continuous monitor carries far more weight in a negotiation. If a result comes back borderline, between 2 and 4 pCi/L, a competent provider explains your options, including a follow-up long-term test, rather than pushing an unnecessary mitigation sale.
For homeowners not in a transaction, a CDPHE discounted long-term kit is a low-cost way to get a representative annual average and a reasonable first step before bringing in a professional. If that kit comes back at or near the action level, a professional follow-up confirms the result with calibrated equipment before any mitigation commitment. Either path is far better than not testing at all, since every Manitou Springs home sits over uranium-bearing granite and the only way to know your number is to measure it.
References
- Radon risk and EPA zone maps — U.S. Environmental Protection Agency
- Colorado radon program and kits — Colorado Department of Public Health and Environment
- Radon and lung cancer — Centers for Disease Control and Prevention
Frequently asked questions
Is Manitou Springs in a high radon zone?
Yes. Manitou Springs sits in EPA Radon Zone 1, the highest-risk category, over the uranium-bearing Pikes Peak granite batholith. Every home should be tested regardless of age or style.
What radon level requires action in Manitou Springs?
The EPA action level is 4 pCi/L. At or above that reading, EPA and CDPHE recommend mitigation. Levels between 2 and 4 pCi/L are still worth considering for reduction.
How much does a radon test cost in Manitou Springs?
A professional short-term test typically runs $135 to $250, while DIY kits cost about $15 to $40 plus lab fees. CDPHE periodically offers discounted kits to Colorado residents.
Why does Pikes Peak granite matter for radon here?
The Pikes Peak granite batholith beneath Manitou Springs is a crystalline rock rich in uranium, the source of radon. That geology is why the whole Pikes Peak area sits in Zone 1.
Can two neighboring Manitou Springs homes have different radon levels?
Yes. Radon depends on the rock beneath the home, foundation type and cracks, and how the home is heated and sealed, so neighboring Victorian homes can read very differently. A neighbor's clean test does not predict yours.
Every Manitou Springs home sits over uranium-bearing granite in EPA Zone 1, so radon testing is basic due diligence, not optional. To connect with a vetted local tester before your purchase deadline or this heating season, get in touch through our contact page.
Test your home for radon
Radon is invisible and odorless, so a test is the only way to know your level. A short-term kit gives a first reading in days; a digital monitor tracks it over time.
| Product | Why | Buy |
|---|---|---|
 AirChek Charcoal Radon Test Kit | Lab fee usually included; EPA short-term protocol. | Amazon — $21.95 |
 First Alert RD1 Radon Test Kit | Widely stocked; 48-hour charcoal test. | Amazon — $16.98 |
 Airthings Corentium Home | Digital monitor with a long-term average. | Amazon — $147.14 |