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Title 40

Displaying title 40, up to date as of 7/16/2026. Title 40 was last amended 7/16/2026.
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Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter DWater Programs100 – 149
Part 142National Primary Drinking Water Regulations Implementation142.1 – 142.313
Subpart KVariances for Small System142.301 – 142.313
General Provisions142.301 – 142.305
§ 142.301What is a small system variance?
§ 142.302Who can issue a small system variance?
§ 142.303Which size public water systems can receive a small system variance?
§ 142.304For which of the regulatory requirements is a small system variance available?
§ 142.305When can a small system variance be granted by a State?
Review of Small System Variance Application142.306 – 142.307
§ 142.306What are the responsibilities of the public water system, State and the Administrator in ensuring that sufficient information is available and for evaluation of a small system variance application?
§ 142.307What terms and conditions must be included in a small system variance?
Public Participation142.308 – 142.310
§ 142.308What public notice is required before a State or the Administrator proposes to issue a small system variance?
§ 142.309What are the public meeting requirements associated with the proposal of a small system variance?
§ 142.310How can a person served by the public water system obtain EPA review of a State proposed small system variance?
EPA Review And Approval of Small System Variances142.311 – 142.313
§ 142.311What procedures allow the Administrator to object to a proposed small system variance or overturn a granted small system variance for a public water system serving 3,300 or fewer persons?
§ 142.312What EPA action is necessary when a State proposes to grant a small system variance to a public water system serving a population of more than 3,300 and fewer than 10,000 persons?
§ 142.313How will the Administrator review a State's program under this subpart?