Tapcensus

Gross Alpha, Excl. Radon and U violations in Oregon

133 active public water systems in Oregon had a Gross Alpha, Excl. Radon and U violation in the past three years, 9 of them in the latest quarter of EPA's data. What Gross Alpha, Excl. Radon and U is and why it matters.

Health effects: Alpha-emitting radionuclides accumulate in bone and soft tissue, delivering sustained internal radiation doses that increase lifetime cancer risk. There is no established safe threshold for ionizing radiation. Individual contributors such as radium-226 and polonium-210 have their own MCLs; gross alpha serves as a cost-effective screening tool that triggers more specific radionuclide analysis when exceeded.

Systems with a Gross Alpha, Excl. Radon and U violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Halls Trailer Court
Umatilla County
60 2 0
Meadow Creek Subdivision
Josephine County
60 2 0
MT Terrace MHP
Coos County
60 4 1
Sand-N-Wood Mobile Villa
Coos County
60 5 2
Welches Water Company
Clackamas County
60 9 0
Willow Glen Subdivision
Josephine County
60 2 1
Ashland Valley Inn
Jackson County
59 6 2
Holiday Mobile Home Park
Josephine County
58 4 2
Blue Spruce Mobile Estates
Jackson County
55 3 1
Oakwood Water System INC
Linn County
55 3 1
Winterview Estates
Josephine County
50 6 2
Raintree Estates
Benton County
50 1 0
Redwood Terrace Assisted Living
Josephine County
50 1 0
Stewarts Addition
Umatilla County
50 5 2
Winchester Ridge
Douglas County
50 3 0
Taylors Landing RV Park
Lincoln County
48 6 1
Darneille Estates
Josephine County
47 2 1
Caveman Mobile Home Park
Josephine County
45 4 3
Shield Crest Condos
Klamath County
45 2 1
Pine Ridge Water CO LLC
Josephine County
44 2 0
Cove Partnership
Klamath County
40 3 1
Deception Creek Mobile Park
Lane County
40 6 1
McKee Bridge Mobile Home Park
Jackson County
40 6 1
North Bayside Estates-South
Coos County
40 2 1
Mint Acres Water Co-Op
Lane County
35 5 1
Cascade Gorge Properties
Jackson County
33 8 1
Desire for Healing, INC
Umatilla County
33 5 0
Galice Subdivision Water CO
Josephine County
33 13 3
Manzanita Hills Subdivision
Jackson County
30 6 3
MT Shadow MHP
Clackamas County
30 3 0
Robbins Nest Residential Park
Coos County
27 6 2
Spar Tree MHP
Clackamas County
26 4 1
Wells Creek RV Resort
Douglas County
25 8 2
About this data

A system is counted once if any of its violations in the past three years involved Gross Alpha, Excl. Radon and U, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Gross Alpha, Excl. Radon and U 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 Oregon 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.