NCore multipollutant monitoring stations 
required under subsection (a); and 
(B) shall use not less than 5 percent, but 
not more than 10 percent, of the amounts made 
available to carry out this section to perform 
the maintenance and repairs necessary to re-
store to operation NCore multipollutant moni-
toring stations that are— 
(i) as of the date of enactment of this 
Act, nonoperational; and 
(ii) located in areas that are des-
ignated as in nonattainment of national 
ambient air quality standards under sec-
tion 109 of the Clean Air Act (42 U.S.C. 
7409) for ozone or particulate matter. 
SEC. 6. SENSOR MONITORING. 
(a) DEPLOYMENT OF AIR QUALITY SENSORS.— 
(1) IN GENERAL.—Not later than 2 years after 
the date of enactment of this Act, the Adminis-
trator— 
(A) shall deploy, in accordance with the 
prioritization 
criteria 
described 
in 
section 
5(d)(2), not fewer than 1,000 air quality sen-
sors, each of which shall cost not more than 
$5,000; 
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(B) shall deploy such air quality sensors in 
clusters of not fewer than five in each of the 
census tracts or counties selected; 
(C) before determining and approving sites 
for such air quality sensors, shall invite, 
through public notice and other means designed 
to reach communities disproportionately im-
pacted by air pollution, proposals from or on 
each behalf of residents of any community for 
the sites; and 
(D) may contract with State and local air 
pollution control agencies to conduct sensor 
monitoring and report the results. 
(2) REQUIREMENT.—In carrying out paragraph 
(1), the Administrator shall select sensors for de-
ployment that— 
(A) are available on the market at the time 
of purchase; 
(B) the Administrator determines will pro-
vide data of sufficient accuracy to provide a 
reasonable basis for determining whether the lo-
cation in which the sensor is sited is or may be 
at risk of exceeding the applicable national am-
bient air quality standard established pursuant 
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to section 109 of the Clean Air Act (42 U.S.C. 
7409); and 
(C) are the lowest cost available that meet 
the criteria of subparagraph (B). 
(3) EXCEPTION
TO
COST
LIMITATION.—Not-
withstanding paragraph (1), if the Administrator de-
termines in writing that a sensor model to measure 
a particular pollutant is not available on the market 
at a price at or below $5,000 each, the Adminis-
trator may spend an amount above $5,000 to ac-
quire such sensor model so long as the Adminis-
trator complies with subparagraphs (B) and (C) of 
paragraph (2). 
(b) POLLUTANTS.— 
(1) IN GENERAL.—Each air quality sensor de-
ployed pursuant to subsection (a) shall measure 
ozone, PM2.5, oxides of nitrogen, or sulfur dioxide. 
(2) DETERMINATION.—The Administrator shall 
determine which pollutant or air pollutants an air 
quality sensor deployed pursuant to subsection (a) 
shall monitor based on the pollution sources affect-
ing the area in which the sensor is to be deployed. 
(c) DETERMINATION AND INSTALLATION.— 
(1) IN GENERAL.—Not later than 18 months 
after the date on which an air quality sensor de-
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ployed pursuant to subsection (a) has been moni-
toring air quality data for 1 year, the Administrator 
shall determine whether data from the air quality 
sensors deployed in the applicable census tract or 
county shows air pollution levels over the 1-year pe-
riod ending on the date of the determination that 
reached 98 percent of the level of the national ambi-
ent air quality standard under section 109 of the 
Clean Air Act (42 U.S.C. 7409) for any air pollut-
ant. 
(2) 
REQUIREMENT.—If 
the 
Administrator 
makes a determination under paragraph (1) that an 
air pollutant described in subsection (b)(1) met the 
threshold described in that paragraph, the Adminis-
trator shall, not later 180 days after the date of the 
determination, ensure that Federal reference method 
monitors or Federal equivalent method monitors are 
installed and in operation within that census tract or 
county for each pollutant that met the threshold. 
(3) EXCEPTIONS.—The Administrator shall 
waive the requirement of paragraph (2) if the Ad-
ministrator finds, within the 180-day period de-
scribed in such paragraph, and after providing no-
tice and an opportunity for public comment, that 
based on clear and convincing evidence— 
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(A) the measurements from the sensor or 
sensors supporting the determination described 
in paragraph (2) were so inaccurate as to pro-
vide no reasonable basis for finding that levels 
of the relevant pollutant reached 98 percent of 
the level of the national ambient air quality 
standard under section 109 of the Clean Air 
Act (42 U.S.C. 7409) for the relevant pollutant; 
or 
(B) complementary data such as informa-
tion on the ambient matric, meteorology, meas-
urements from other nearby sensors or ambient 
monitors, modeling, satellite data, or other rel-
evant and reliable information demonstrate that 
levels of the relevant pollutant could not have 
plausibly reached 98 percent of the level of such 
standard. 
(d) REPORT.—Not later than 1 year after the date 
of enactment of this Act, and not less frequently than 
every 6 years thereafter, the Administrator shall report 
on additional areas of decision making where data from 
low-cost air quality sensors may be relevant and useful. 
(e) AUTHORIZATION OF APPROPRIATIONS.—There is 
authorized to be appropriated to carry out this section 
$6,000,000. 
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SEC. 7. DATA REQUIREMENT. 
To the extent practicable, the Administrator shall in-
tegrate the data collected through the programs estab-
lished under this Act into the Environmental Justice 
Screening and Mapping Tool (EJSCREEN) of the Envi-
ronmental Protection Agency or a relevant similar map-
ping and screening tool. 
SEC. 8. STUDY ON HOW TO EXPAND AMBIENT AIR MONI-
TORING AND ACCESS TO AIR QUALITY INFOR-
MATION FOR CERTAIN COMMUNITIES. 
(a) IN GENERAL.—The Administrator shall— 
(1) conduct a study to formulate recommenda-
tions on how to expand ambient air monitoring and 
access to air quality information for communities af-
fected by— 
(A) levels of air pollution above 100 on the 
Air Quality Index of the Environmental Protec-
tion Agency; and 
(B) high asthma rates; and 
(2) not later than 1 year after the date of en-
actment of this Act, complete such study and submit 
to the Congress a report on the results of such 
study. 
(b) PRIORITIZATION.—In conducting the study under 
subsection (a), the Administrator shall prioritize formu-
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