Radiological
Beta/photon emitters
What it is
A screening measurement of beta radiation in water, from natural minerals (like potassium-40) and some human-made sources. Water systems compare results to a 50 pCi/L screening level.
Your body
According to EPA, long-term exposure above the federal limit has been linked to an increased risk of cancer.
Your home
Beta emitters do not affect plumbing.
Federal standard: MCL 4 millirem/year (EPA uses 50 pCi/L as a screening level)
Treatment options that can reduce it
Research & sources (2)
Maryland water systems that reported beta/photon emitters
- City of CambridgeDorchester · 2025 data
- City of FrederickFrederick · 2025 data
- City of SalisburyWicomico · 2025 data
- Easton UtilitiesTalbot · 2025 data
- Harford County Department of Public WorksHarford · 2025 data
- Howard County Department of Public WorksHoward · 2025 data
- Town of OxfordTalbot · 2025 data
- Town of St. MichaelsTalbot · 2025 data
- Town of TrappeTalbot · 2025 data
- WSSC WaterMontgomery and Prince George's · 2025 data
The information on this site is for general education only and is not medical advice. Talk with a qualified health professional about health concerns. Water treatment equipment performance depends on the system, its certification, and proper maintenance.
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