# Minor Clarification of National Primary Drinking Water Regulation for Arsenic
> **Rule** · Final rule. · Published 2003-03-25 · Effective 2003-04-24 · 68 FR 14502
## Document
- **Document number:** 03-7048
- **Category:** other
- **Federal Register citation:** 68 FR 14502
- **CFR reference:** 40 CFR 141
- **Publication date:** 2003-03-25
- **Effective date:** 2003-04-24
- **EPA docket:** FRL-7472-5
## Abstract

Today, EPA is revising the rule text in its January 2001 final rule that established the 10 parts per billion arsenic drinking water standard to express the standard as 0.010 mg/L, in order to clarify the implementation of the original rule.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/03/25/03-7048/minor-clarification-of-national-primary-drinking-water-regulation-for-arsenic)
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