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18 EPA J. 16 (1992)
Breaking Polluted Air

handle is hein.journals/epajrnl18 and id is 17 raw text is: The Issu

to be discharged by industrial and
municipal drain pipes. If assumed
consumption is too low, toxic
emissions may be permitted that are a
danger to public health.
In our study, the average
consumption for the full sample was
18.3 grams/person/day, quite a bit
higher than the 6.5 gram assumption
currently used in Rule 1057. Further,
when the sample was broken down by
ethnic groups, non-reservation Native
Americans consumed 24.3
grams/person/day compared to 20.3
grams/person/day for other minorities,
and 17.9 grams/person/day for whites.
In an analysis involving multiple
variables, we found that middle-age
Native Americans had the highest rates
of consumption of all Native
Americans, or 30.6 grams/person/day.
We would expect on-reservation
subsistence fish consumption to be
even higher than these levels,
especially on poorer reservations, such
as Bay Mills, where poverty dictates
subsistence fishing as a protein source
that is also sanctioned by traditional
culture. For all Great Lakes tribes with
high fish consumption levels, there is
strong reason for concern for the
public health of the reservation. By
way of illustration, studies have found
a high correlation between high levels
of consumption of Great Lakes fish and
high levels of PCBs in the blood of the
consumers.
In sum, a great deal of concern is
warranted for the health of Michigan
Great Lakes Indians based on studies
done elsewhere; based on our sport
fish consumption study that includes
off-reservation Indians in Michigan;
and based on studies tying high Great
Lakes fish consumption with high
toxic loads in the human body.
However, direct studies of
on-reservation fish consumption are
badly needed for Great Lakes tribes as
well as for those in the Pacific
Northwest and elsewhere. A major
study is about to get underway in the
Pacific Northwest, and Michigan tribes
have approached EPA about the need
for studies on their reservations. These
will be key studies not only for
assessing the potential impact of fish
consumption on the health of Great
Lakes tribes but also in terms of
protecting their Great Lakes fishing
rights. 0

BREATHING
POLLUTED

AIR

by
D. R. Wernette
and
L. A. Nieves

Minorities Are
Disproportionately
Exposed
A t Argonne National Laboratory,
scientists have been studying the
relative potential for exposure of
minority population groups to
substandard outdoor air quality. The
studies have focused on areas
identified by EPA as failing to attain
national ambient air quality standards.
Under the Clean Air Act, EPA has
established standards for ground-level
ozone, carbon monoxide, sulfur
dioxide, nitrogen dioxide, lead, and
particulate matter and annually
identifies areas having excess levels of
these pollutants. These so-called
nonattainment areas generally
consist of counties of many square
miles, and residents' exposure to air
pollution surely varies depending on
where individuals live and work
within an area. Nevertheless, the racial
and socioeconomic makeup of the
population in these areas can imply
differences in potential exposure to
pollutants and may suggest directions
for research and remedial action. So
(Wernette is a sociologist and Nieves is
an economist in the Environmental
Assessment and Information Systems
Division at Argonne National
Laboratory. The research described in
this article has been supported under
contract with the U.S. Department of
Energy, Office of Minority Economic
Impact.)

far, scientists have examined these
differences for African Americans,
Hispanics, and whites (non-Hispanic).
In the United States, excluding
Alaska and Hawaii, higher percentages
of both African Americans and
Hispanics live in areas with reduced
air quality than do whites. For
instance, 52 percent of all whites live
in counties with high ozone
concentrations; for African Americans,
the figure is 62 percent, and for
Hispanics, 71 percent. Population
group distributions were found to be
similar for the other pollutants cited
above.
These differences in potential
exposure to pollutants may be due in
part to minority population
distributions across regions. Hispanics,
for example, are more concentrated in
the West, where there is a greater
tendency than elsewhere for the
population as a whole to be exposed to
high levels of ozone. However, the
different regional concentrations of
population groups do not account for
all of the differences in their potential
exposure to reduced air quality. Not
only are percentages of minorities
living in substandard air quality areas
higher for the country as a whole, but
they are higher when the four U.S.
census regions are considered
separately.
For example, 50 percent of whites in
the Northeast census region live in
areas with excessive carbon monoxide.
In contrast, 85 percent of northeastern
African Americans and 88 percent of
northeastern Hispanics reside in those
areas.
In 1990, 437 of the 3,109 counties
and independent cities in the United
States failed to meet at least one of the
EPA ambient air quality standards. Of
these counties, 136 had excessive
levels of two or more pollutants, 29
exceeded standards for three or more
pollutants, seven exceeded standards
for four or more pollutants, and one
exceeded standards for five pollutants.
To what extent do the proportions of
whites, African Americans, and
Hispanics living in these counties
differ? As the bar chart shows, 57
percent of all whites, 65 percent of
African Americans, and 80 percent of
Hispanics live in the 437 counties with
substandard air quality. Out of the
whole population, a total of 33 percent
of whites, 50 percent of African

EPA JOURNAL

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