1. Short title This Act may be cited as the Crowd Sourcing of Environmental Data Act of 2017 . 2. Option for expanded monitoring (a) In general Section 110(a) of the Clean Air Act ( 42 U.S.C. 7410(a) ) is amended by inserting after paragraph (3) the following: (4) Option for expanded monitoring (A) In general Any State may include in a State implementation plan a program for monitoring one or more covered criteria air pollutants in one or more designated areas by— (i) continuing to use the monitoring system (including for purposes of baseline measurements) that was in operation as of the submission of the revision to the plan; and (ii) greatly increasing the number of air quality sensors, which may include mobile sensors, for such monitoring system. (B) State discretion Subject to subparagraphs (C) and (D), the Administrator shall allow a State to make a revision to a State implementation plan in accordance with subparagraph (A) at the State’s discretion. (C) Ensuring quality On an annual basis, each State that conducts monitoring pursuant to this paragraph, as a condition on the continuation of such monitoring, shall demonstrate to the Administrator that the quality of the data produced through such monitoring meets all applicable data quality standards under this Act. (D) Review by Administrator A State’s annual demonstration under subparagraph (C) is deemed to have met the standard described in such subparagraph unless the Administrator issues a written response— (i) finding that such standard is not met; and (ii) explaining the basis for such finding. (E) Greater regulatory flexibility With respect to each designated area in which a State conducts monitoring pursuant to this paragraph, the Administrator— (i) shall not require any particular method of monitoring to be used or not used, so long as the data derived from such monitoring meets all applicable data quality standards under this Act, as described in subparagraph (C)