Tapcensus

Combined Radium (-226 and -228) violations in Colorado

67 active public water systems in Colorado had a Combined Radium (-226 and -228) violation in the past three years, 26 of them in the latest quarter of EPA's data. What Combined Radium (-226 and -228) is and why it matters.

Health effects: Radium is a bone-seeking radionuclide that accumulates in skeletal tissue after ingestion. Long-term exposure increases the risk of bone cancer and leukemia. There is no safe threshold for ionizing radiation — the MCL is set at a level balancing risk reduction with treatment feasibility. Children are particularly vulnerable due to higher rates of bone growth and calcium uptake.

Systems with a Combined Radium (-226 and -228) violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Westcreek Lakes WD
Douglas County 		165 8 2
Bristol Wsd
Prowers County 		151 2 0
Ramah Town of
El Paso County 		125 7 2
Pioneer Lookout WD
El Paso County 		120 5 0
Excell Lawson Village
Clear Creek County 		90 3 0
North Washington Wua
Adams County 		90 6 5
Valley Mobile Home LLC
Alamosa County 		85 12 1
Ridgewood WD
Teller County 		84 5 0
Big Pines Campground
El Paso County 		72 2 0
Signal Mountain Ranch Property Owners WC
Pueblo County 		66 5 1
Two Buttes Town of
Baca County 		64 9 3
Hartman Town of
Prowers County 		61 13 6
Three Mile TP
Garfield County 		50 3 0
Saddlehorn Ranch MD
El Paso County 		39 8 1
G and M Mobile Home Park
Rio Grande County 		30 11 0
Hidden Springs Ranch
Routt County 		27 7 0
Ranch at Coulter Creek HOA
Garfield County 		27 10 0
About this data

A system is counted once if any of its violations in the past three years involved Combined Radium (-226 and -228), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Combined Radium (-226 and -228) alone.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Colorado records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.