Mercury in Drinking Water
Reference information plus historical EPA compliance records associated with mercury.
EPA Limit (MCL)
2 ppb
EPA Goal (MCLG)
2 ppb
Category
Inorganic
Regulatory values are a concise reference, not legal or medical advice. Confirm the current standard and rule-specific details on EPA.gov.
Health Effects
Kidney damage
Common Sources
Erosion of natural deposits, discharge from refineries and factories
Treatment Considerations for Mercury
Commonly cited treatment approaches include: Reverse osmosis, distillation. Choose treatment only after a certified water test identifies the substance and concentration; verify NSF/ANSI certification and consult a qualified local professional when needed.
Frequently Asked Questions
What is Mercury and why can it appear in drinking-water records?
Mercury can be associated with drinking water through: Erosion of natural deposits, discharge from refineries and factories.
What reference value does this page show?
The summarized EPA Maximum Contaminant Level is 2 ppb. Some substances use action levels or rule-specific thresholds instead, so verify the current EPA standard.
Does a historical violation record mean it is in my tap today?
No. A compliance record may be historical or resolved. Use the latest Consumer Confidence Report or a certified test for current local conditions.