Skip to main content
. Author manuscript; available in PMC: 2020 Oct 1.
Published in final edited form as: Environ Sci Technol. 2019 Sep 10;53(19):11478–11485. doi: 10.1021/acs.est.9b02358

Figure 1.

Figure 1.

(a) (top left) The percent of U.S. PWS (CWS and NTNCWS) in violation for arsenic (exceedance of MCL) by source type between 1994 and 2017; (b)(top right) The number of U.S. PWS (CWS and NTNCWS) in violation for arsenic (exceedance of MCL) by system size between 2006 and 2017; (c) (bottom right) The percent of U.S. PWS (CWS and NTNCWS) in violation for arsenic (exceedance of MCL) by maximum consecutive years in violation.