Radon mitigation in Holladay, Utah
Holladay has the oldest housing of any city with a guide on this site, and many homes already have a radon system someone else installed. Here's how to handle both situations.
Holladay at a glance. In Utah's state test-kit data (2006–2019), Holladay averaged 4.6 pCi/L, with 38% of tests at or above 4 (Source: Utah IBIS). 69% of Holladay homes were built before 1980, and the median year is 1969 (Source: U.S. Census ACS).
Holladay radon test results
| Area (Utah IBIS small area) | Average, pCi/L | 95% range of the average | Tests at or above 4 | Tests |
|---|---|---|---|---|
| Holladay | 4.6 | 4.12–5.12 | 38.2% | 650 |
Source: Utah IBIS (Source: Utah IBIS). Caveats on this data.
Holladay homes
| Holladay housing (ACS 2020–2024) | Value |
|---|---|
| Median year built | 1969 |
| Homes built 2000 or later | 14% |
| Built 1980–1999 | 17% |
| Built before 1980 | 69% |
| Owner-occupied | 79% |
| Housing units | 12,545 |
Source: U.S. Census ACS 2020–2024 (Source: U.S. Census ACS).
Already have a radon system? Check it
In an established city like Holladay, you may have bought a home with a system already installed. EPA and Utah DEQ guidance gives a quick checkup:
- Look at the manometer (the U-shaped tube on the pipe). The liquid levels should be uneven, which shows the fan is pulling suction. If they're level, the fan may have stopped (Source: EPA).
- Listen for the fan, usually in the attic, the garage or on an exterior wall.
- Know the fan's age. Utah DEQ says fans typically need replacing after about 15 years (Source: Utah DEQ). The University of Utah puts updates and maintenance at that point around $500 (Source: University of Utah).
- Retest. Utah DEQ recommends testing every two years even with a system (Source: Utah DEQ). A system installed before a basement was finished, or before a big addition, may no longer cover the whole footprint.
A fan replacement or a system that needs a second suction point is a smaller job than a new install. Ask for it as such.
No system yet? Older-home considerations
- Block foundations: some older homes have hollow block walls, which can need block-wall suction (Source: EPA). Methods.
- Remodels: test before finishing a basement, and again after (Source: EPA).
- Selling an older home? EPA suggests testing and fixing before listing (Source: EPA). Utah home-sale walkthrough.
Cost in Holladay
No Holladay-specific price data yet. Utah's typical new system is about $1,800–$2,000 (Source: Utah DEQ). Repairs to an existing system usually cost less. Try the estimator for a new install, and get written bids from licensed contractors.
Nearby
Millcreek (north) · Cottonwood Heights and Murray (south and west; see the valley table) · Sandy · All cities
Talk to a licensed contractor who works in Holladay
Call (801) 854-8750, whether you need a new system or a check on an old one. We'll connect you with a licensed Utah contractor who serves Holladay.
Sources
Last reviewed October 22, 2026.
- Indoor radon levels by county and ZIP, query module (short-term tests 2006–2019; dataset updated Jan. 31, 2020), Utah Dept. of Health and Human Services / Utah DEQ Indoor Radon Program. Accessed October 22, 2026.
- American Community Survey 2020–2024 5-year estimates, tables B25034, B25035, B25003 (via Census Reporter), U.S. Census Bureau. Accessed October 22, 2026.
- Consumer's Guide to Radon Reduction: How to Fix Your Home (2016), U.S. Environmental Protection Agency. Accessed October 22, 2026.
- High radon levels? What's next, Utah Department of Environmental Quality. Accessed October 22, 2026.
- Radon resources (updated June 20, 2025), University of Utah radon program. Accessed October 22, 2026.
- Home Buyer's and Seller's Guide to Radon (EPA 402/K-24/001, rev. March 2024), U.S. Environmental Protection Agency. Accessed October 22, 2026.