A
b
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P
at h
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N P
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)
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ai
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nit
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t
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h
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g
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p
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at
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n
a
d d
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em
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m
p
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y
16
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ag
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18
3 2 6 St
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to rm
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3 3 2 0 0 6 P
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F
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15
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or(
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ap
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M
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um m
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t
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cf
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at4 1
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,w
h
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m
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t
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P
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am i
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t
h
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at
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c o nt
am
i
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i
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g
c a u s e of im
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air e
d
s u rf
a c ew
at
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nt
h
eU
.S
.(
A
rn
ol d
a nd G ib b
on
s,19 9 6
)
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h
e2
0 04
N
ati
o n al
W
at
e rQ
u al i
t
y I
n v e nt
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:R
ep
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A
,2 0 0 9
)
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at
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h
at
p
at
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og
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b
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a)
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h
e n um b
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i
m
p
ai
rm
e nt
f
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v e r s/
st
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t
u a ri
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s c o nt
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t
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et
h
et
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i
n2 0 10
,
w i
t
h T h
eN
at
i
o n al
W
at
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t
y
A
s s e s sm
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R
ep
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(
E
P
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,2 0 1 0
)
sta
t
in
g
t
h
at
p
at
h
og
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h
el
e ad i
ng
c a u s e of i
m
p
ai
rm
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f
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m
p
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d
s u rf
a c ew
at
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h
e r ep
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fo r
N
o rt
h
C
a r ol i
n
a sta
t
e st
h
at
f
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c ol i f
o rm
p
at
h
og
e n s a r eth
ef
o u rth
c a u s e of i m p
ai
rm
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f
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v e r s a nd
st
r e am
s, c o nt
ri b
ut
i
ng
t
o10
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%
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i m
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air e
d w
ate r
m i l
e s.P
ath
og
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t
i
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sm
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ch
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nth
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s.So u r c e s o
f
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am i
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l
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A
,2 0 1 2
)
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jl
a s
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om
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c o nt
a ct
w it
h
n at
u r al w
at
e r c a n r e s ul
t
in
t
h
ef
ol l
ow i
ng
h
e alt
h
e
ff
e ct
s : sk in
r a sh
e s, ey
e a nd
n o s ei
nf
e ct
i
o n s a nd
a c ut
eg
a st
r oi
nt
e st
i
n al i l l
n e s s,in c
lu
di
ng
c r a
m
p
s a nd d i
a r rh
e a(
P
r u s s,1 9
9 8
)
.F
e c al
in
d
i
c at
o rb
a cte r
i
a a r e u s ed
,b
e c a u s ei
t
i
sd i f fi
c ult
,t
i m
e-c o n s u
m
i
ng
, an
d
e x
p
e n si
v et
ote s
t
f
o r ala r
g
e v a rie
t
y
of
sp
e ci fi
cp
at
h
og
e n s(
E P
A
,2 0 1 2
)
.R
e c e nt
l
y
,
t
h
eE P
A
h
a s sta r
t
ed
r e c om
m
e nd i
ng
t
h
at
st
at
e sm
o nit
o r s u rf
a c ew
at
e rp
at
h
og
e n s u sin
g E
s ch
e ri
ch
i
a c ol
i
o r e n
t
e r o c o c ci i
n ste a
d
of
f
e c al
c ol i f
o rm
, a st
h
ey
a r em
o r eh i
g
h l
y
a s s o ci
ate
d w
i
t
h h
um
a nh
e al
th
ri
sk
(
E P A
,2 0 12
)
.H
ow
e v e r, s
i
n c ef
e c al
c oli f
o rm
sh
a v eb
e e nt
h
e sta n
d
a rd
r eq
ui
r ed
f
o rm
o ni
t
o rin
g
a nd
r ep
o rti
ng
m i
c r ob ia
l
c o nt
am i
n at
i
o nt
ot
h
eE P
A i
nt
h
ep
a st
,d
at
af
o rt
h
o s eb
a ct
e ri
a a r em
o st
p
r e v al
e nt
a c r o s s sp
a c e a nd
t
i m
e a nd
t
h
u sw
e r e s el
e ct
ed f
o r u s ein
th i
s st
ud
y
.T h
el
a ck
of k
n ow l
ed
g
e o nt
h
e s o u r c e an
d
t
r an sp
o rt
of N
P
S
c o nt
am i
n a nt
s,i
n clu
d i
ng
f
e c al
c ol i f
o rm
s,h
a sl
ed
to
ag
r ow i
ng
b
od
y
of
s ci
e nt
i fi
c r e s e a r ch
ai m
ed
at
p
r ed ic
t
in
g w
at
e rq
u al i
t
y
d
eg
r ad
at
io n
fr
om l
a nd
c o v e r v a ri
ab
l
e s,i
n cl
ud
in
g
l
e v el
of d
e v elo
p
m
e nt
, u rb
a ni
z at
i
o n,a n
d
i
m
p
e r vio u s
s u rf
a c e c o v e r ag
e(M
al l i
n et
al
.2 0 0 9
)
.M
o st
p
r e vi
o u s stu
di
e s of N
P S
p
ol l
ut
io n
h
a v eb
e e nf
o c u s ed
o n "l
ow
o rd
e r st
r e am
si
n sm
al l
c at
ch
m
e nts
w it
h
aw i d
e v a rie
t
y
o
f
la n
d
u s e s s am p
l
ed
o v e r sh
o rt t
i
m
ep
e ri
od
s(
<1 y
e a r)
,"
(
B
ak
e r,2 0 0 5
,p
2
)
.S
i m i l
a r st
ud i
e sh
a v e n ot
b
e e n c o nd
u ct
ed
at
ala r
g
e rm
u
l
t
i
-w
a
t
e r sh
ed
, st
at
e-
le v e
l
s c al
e.
O
n e of
t
h
em
ai
n c o nt
ri b
ut
io n s o
f
t
h
e r e s e a r ch
p
r e s e nt
ed i
nth i
st
e chn
i
c al
r ep
o rt
is
t
h
ein v e s
t
i
g
at
i
o n of
t
h
e r el
at
i
o n sh i
p
b
etw
e e nl
a nd
c o v e r a nd f
e c al
c ol i fo r
m
c o nt
am i
n ati
o n at
al
a rg
e, st
at
e-
l
e v el g
e og
r ap
h i
c al
s c al
e.N
o rt
h C
a r ol in a
h
a s s u rf
a c ew
at
e rm
o ni
to
ri
ng l
o c at
i
o n sC
a r ol i
n a al l
ow
sf
o rt
h
e u s e of g
e o sp
at
i
al
st
at
i
st
i
c al m
eth
od
st
op
r ed i
ct
w
at
e rq
u al i
t
y
at
u n
m
o ni
t
o r ed l
o c at
i
o n s.T h
u s,
t
h i
s st
ud
y
em
p
l
oy
s al
a nd
u s e r eg
r e s si
o n a n al
y
si
s a c r o s sth
ee n
t
i
r e st
at
e.T h
e a n al y
si
si
sp
e rf
o rm
ed i
n o rd
e rt
od
et
e rm
i
n ei f
f
e c al
c ol
i f
o rm
c o nt
am
i
n at
i
o ni
s r el
at
ed
t
ol
a nd d
e v el
op
m
e nt
ch
a r a ct
e ri
st
i
c s s u ch
a sl
a nd
c o v e r ,i m
p
e r vi
o u s c o v e r , r o ad
n e
t
w
o rk
d
e n si
t
y
,p
op
ul
at
i
o n a nd h
o u si
ng
d
e n si
t
y
a nd d
i
ff
e r e nt
st
o rm
w
at
e rm
a n ag
em
e nt
p
ol i
ci
e s at t
h
e st
at
el
e v el
.A
n
oth
e r si g
ni f
i c a nt
c o nt
ri b
ut
i
o n of
th i
s r e s e a r ch i
sth
ei
n c o rp
o r at
i
o n of
st
at
e a nd
f
ed
e r al
st
o rm w
at
e rp
ol i
ci
e si
nt
o ap
r ed
i
ct
i
v e r eg
r e s si
o nm
od
el
.N
op
r e vi
o u s st
ud i
e sw
e r ef
o u nd
,w h
i
ch i
n c o rp
o r at
e st
o rm
w
at
e rm
a n ag
em
e nt
p
ol i
ci
e si
nt
o ap
r ed i
ct
i
v em
od
el
of
su rf
a c ew
at
e rq
u al i
t
y
.H
ow
e v e r ,th
e r ei
s ag
o od
ch
an
c et
h
at
s u ch
p
r og
r am
s c o ul d h
a v e an
i m
p
a ct
o nc o n
t
am
i
n
a nt
l
e v el
s.T
h i
s st
ud
y
sp
e ci fi
c al l
y
in
cl
ud
e sp
ol i
cy
v a ri
ab l
e si
nt
h
em
od
el
s el
e cti
o np
r o c e s s a nd f
o u nd
th
at
i
n cl
u si
o n of
p
ol i
cy
v a ri
ab l
e sh
el
p
ed i m
p
r o v em
od
el f
it
b
y
ab
o ut
5
%
.T h
ef
i n al m
ul
t
i
v a ri
at
em
od
el h
a st
h
ep
ot
e nt
i
al
t
oi m
p
r o v ep
r ed
i
ct
i
o n s of f
e c al
c o
l i f
o rm
at
u nm
o nit
o r ed l
o c at
i
o n s o v e r si m
p
l
ei
nt
e rp
ol
at
i
o nm
et
h
od
s.A
d d i
t
i
o n al l
y
,th
em
od
el
p
r o vi d
e s u s ef
i il i
nf
o rm
at
i
o nt
ol
a nd
-u s e
p
l
a n n e r s, r e s o u r c em
a n ag
e r s a nd
r eg
ul
at
o ry
a
g
e n ci
e s r eg
a rd i
ng
t
h
e c u r r e nt
c o nd it
i
o n s of w
at
e rq
u al i
t
y
a c r o s sth
e st
at
e of N
o rt
h C
a r ol i
n a.T
h i
si
nf
o rm
at
i
o n c a nh
el
p
i
np
ri
o rit
i
zi
ng
fu
t
u r em i
t
i g
ati
o n a nd
r e st
o r at
i
o n ef f
o rt
s.F
o r e x am
p l
e,w
e u s ed
th
ep
r ed i
ct
i
v em
od
el
d
e ri
v ed i
nt
h i
s st u
d
y
t
o an
al
y
z ed i f f
e r e nt
l
o c al
g
o v e r nm
e nt
st
o rm w
at
e rb
e st
m
a n ag
em
e nt
p
r a ct
i
c e s(
B
M
P
)
i m
p
l
em
e nt
ati
o nm
eth
od
sa c r o s s
th
e st
at
e.T
h
ef
i nd i
ng
si
nd i
c at
et
h
at
ch
a rg
i
ng
f
e e sf
o r n o n c om
p
l i
a n c ei
nl
o ng
-t
e rm
B
M
P
m
ai
nt
e n a n c e r e sp
o n si
b i l i
t
i
e si
s a s s o ci
at
ed w i
th l
ow
e rf
e c al
c ol i f
o rm l
e v el
s.H
ow
e v e r ,2
.B
a ck
g
r o u nd
2
.1 L
a nd
U
s e a nd
F
e c al C
ol i
f
o rm
M
an
y
stu
d i
e sh
a v ei
n v e st
i
g
ate
d
t
h
el i
nk b
et
w
e e nl
a nd
c o v e r o ri
m
p
e r vi
o u s s u rf
a c ea n
d w
at
e rq
u al i
t
y
.B
a rbe c
et
al
.(
2 0
0 2
)
p
r o vi d
e a r e vi
ew
of
a rt
i
cl
e sw h i
ch l i
nk l
e v el
of
i m p
e r vi
o u s s u rf
a c e st
ow
ate r
q
u al i
t
y
.A
r n ol d
a nd G i b b
o n s(
1
9 9 6
)
al
s ol
o ok
at t
h
e r ela
t
io n s
h i p
b
etw
e e ni m p
e r vi
o u s c o v e r a nd w
at
e rq
u al i
t
y
a nd
p
r o vi d
e str a
t
eg
i
e st
o r edu c e
i m
p
e r vi
o u ss u r
f
a c e sf
o r c om
m
u ni
t
y p
l
a n ni
ng
, si
t
e -l
e v e
l
p l
a n nin
g
a nd d
e si
g
n , a nd l
a nd
u s e r eg
ul
at
i
o n .B
ak
e r(
2 0 0 5
)
sy
nth
e siz e s
l i
te r a
tu r e
in v e s
t
i
g
at
i
ng
t
h
e r el
at
i
o n sh i
p
b
et
w
e e nl
a nd
u s e a nd w
ate r
q
u al i
t
y
,b
ot
h f
o r u rb
a n a nd
ag
ri
c ul
t
u r al i m
p
a ct
s,l
o ok i
ng
at
n ut
rie n
t
, ch
em i
c al
a nd b
a ct
e ri
al
c o n
t
am in a n
t
s.O
n e c o n cl
u si
o nh
em
ak
e si
st
h
at
, "i
ng
e n e r al
, a s s o o n a s u rb
a nl
a nd
u s ei
n c r e a s e sb
ey
o nd
a sm
al l p
e r c e nt
ag
e of
t
ota
l l
a nd
c o v e r(
~
5
%
; t
h
ep
r e ci
s e am
o u nt
r eq
ui
r e sf
u rt
h
e r r e s e a r ch
)
,t
h
e nu
rb
a nla n
d
u s ei m p
a cts
o nw
ate r
q
u al it
y
d
om
i
n ate
o v e r ag
ri
c ul
t
u r al
"(
p
.5
)
.O
t
h
e r st
ud i
e sh
a v el
o ok
ed
at
m
e a s u r e s s u ch
a sp
op
ul
at
i
o nd
e n si
t
y
(
P
ei
e rl
s et
al
.,
1
9 9 1
;
F
r e n z el
a nd C
o u vi l l i
o
n,2 0
0 2
)
,h
o u si
ng
d
e n si
t
y
(
Y
o u ng
an
d T h
a ck
st
o n,19 9 9
;
G
oo
n et
i l l
ek
e et
a
l
.2 0
0
5 ; L
oh
s e a nd
M
e r e nl
e nd
e r,2 0 0 9
)
, s ep
t
i
cta n
k
d
e n sit
y
(
K
el
s ey
et
al
.,2 0 04
; C
ah
o o n et
a
l
.,2 0
0 6
)
, a nd
c om
m
e r ci
al
,i
nd
u st
ri
al
, a nd
r e si d
e nt
i
al
z o ni
ng
(
S
elv a
k
um
a r a nd B
o r st
2 0 0 6
;
M
al l i
n et
al
.2 0
0 9
,H
a r cl
e r od
e et
al
,2 0 1 2
)
.St
ud ie s
h
a v e al
s olo o
k
ed
at
ch
a ng
in
g l
a nd
u s ea n
d w
at
e rq
u al i
t
y
w i
th i
n aw
at
e r sh
ed
o v e r al
o ng p
e rio
d
of
t
i m
e(
R
e n et
al
.2 0 0 3
,M
eh
af fe
y
et
a
l
.2 0 0 5
)
.F i g
u r e1
sh
ow
st
h
e r el
at
io n s
h i p b
et
w
e e ni m p
e r vi
o u s s u rf
a c e a nd
st
r e am h
e al
t
h
b
a s ed
o nt
h
e r e s e a r ch b
y S
ch
u el
e r(
1
9
9 2
)
,w h i
ch w
a s up
d
at
ed i
n2 0 0 9
(
s e eSh
u ele r
et
al
.S
p
e ci f
i ct
of
e c al
c ol i f
o rm
c o n
t
am i
n at
i
o n ,F
r e n z el
a nd
C
o u vi l l i
o n(
2 0 0 2
)
sh
ow
ed
t
h
at t
h
e r ei
s a c o r r el
ati
o nb
et
w
e e nf
e c al
b
a ct
e ri
a a nd
p
op
ul
at
i
o nd
e n si
t
y
a ss
h
ow
ni
nF i g
u
r e2
.A
n ot
h
e r st u
d
y
b
y
S l i
v a a nd
W
i l l i
am
s(
2 0 0 1
)
sh
ow
ed
c o r r e
l
at
i
o n sb
et
w
e e n u rb
a nl
a nd
u s ea n
d f
e c al
c ol i f
o rm
sw i
t
h i
n u rb
a ni
z ed
c a
t
ch
m
e nt
s.Y
o un
g
a nd
T h
a ck
st
o n(
19 9 9
)
f
o u nd
t
h
at
t
ri b
ut
a ri
e si
ns
ew
e r ed b
a si
n sh
ad h i
g
h
e rb
a ct
e ri
ac o u n
t
st
h
a nt
h
o s ei
n n o n -s ew
e r ed
b
a si
n s a nd
t
h
at
"f
e c al
b
a ct
e ri
aF i g
ur e1
.S
ty
l
i
z ed
r el
a ti
o n sh
i
p
of
i m
p
e r vi
ousn e s s t o st
r eam
h
eal
t
h
(
m
od
i
fi
ed
f
rom
S
ch
u el
e r1 9
9
2
)
,f
r om
A
r n old
a nd G
i
b bo n s
(
19 9 6
)
,p
2
4
6
I M FV kC T E O
S T R E A M H EA LT H
F i
g
ur e2
.G
r ap
h
of
m
eanE C
ol
i
a nd F
e cal C
ol
i
f
orm
a
g
ai
n st p
op
ula
ti
ond
e n sit y
(
A
f
t
e rF
r e n zel
and C
ou vi
l l
i
on(
2 0 0 2
))
;F
r om
:B
ak
e r(
2
0 0 5 )
,p
3
l O OOc
' -1«)
I
1
1 0■ E . Coli 0 F^: e c al Co(i
1 0 100 1 000
^ 10 00 0
d
e n sit
i
e sw
e r e r el
at
ed
t
ot
h
ed
e n si
t
y
o
f h
o u si
ng
,p
op
ul
at
i
o n ,d
e v el
op
m
e nt
,p
e r c e nt
i m
p
e r vi
o u s a r e a, a nd
ap p
a r e nt
d
om
e st
i
c a ni
m
al d
e n si
t
y
"(p
.1 1 7 7
)
.M
al l i
n et
al
.(
2 0 0 0
)
c o nd
u ct
ed
a st
ud
y
of N
o rt
h C
a r ol i
n a c o a st
al w
at
e rq
u al i
t
y
,f
i nd i
ng
t
h
at
f
e c al
c ol i f
o rm
a
b
u nd
a n c ew
a s si
g
n
i f
i c a nt
l
y
c o r r el
at
ed w i
t
h
t
h
ep
op
ul
at
i
o n a nd
t
h
ep
e r c e nt
ag
e of d
e v el
op
ed
l
a nd w i
t
h i
nt
h
ew
at
e r sh
ed
, a nd m
o st
st
r on
g
l
y
w i
t
h
t
h
ep
e r c e nt
ag
ew
at
e r sh
ed
-i
m
p
e r vi
o u ss u r
f
a c e c o v e r ag
e(p
.1 0 4 7
)
.I
n am
o r e r e c e nt
st
ud
y
,M
al l i
n et
al
.(
2 0 0 9
)
al
s o st
ud i
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t
h
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s of d i ff
e r e nt
l
a nd
u s e s
t
ob
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w
at
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t
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.I
n ad d
i
t
i
o nt
ot
h
et
y p
i
c al
l
a nd
u s e c at
eg
o ri
e s of
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a nd
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i
m
p
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a c e c o v e r ag
e,p
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ag
ri
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t
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(
i
n cl
ud
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r a zi
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an
d
)
a nd
f
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ry
c om b i
n ed
,"
t
h
ey
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s oi
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nd
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w h i
ch
c o
m b i
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"
p
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of
l
a nd
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t
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ai l
b
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i
t
ut
i
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s u ch
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i
e s)
"(
p
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s sh
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h
at
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e n
t
i
al
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w
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t
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r at
i
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ow
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h
ey
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t
h
at
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g
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l y
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at
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t
of
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h
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t
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at
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r st
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sf
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t
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h
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2
0
0 2
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at
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l
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m
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et
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sw
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h i
sf
i
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t
h
F
i
sh
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t
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at
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r om w i l d
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ep
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.2
S
t
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w
at
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ol i
ci
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e c al C
ol i
f
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S i
n c eN
P S p
ol l
ut
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h
e n at
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e ad i
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t
h
r e at
t
ow
at
e rq
u al i
t
y
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r og
r am
st
o c o nt
r ol
s u rf
a c ew
at
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a v eb
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e vi
s ed b
y
f
ed
e r al
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at
e a nd l
o c al
g
o v e r nm
e nt
s.F
o r e x am
p
l
e.N
o rt
h C
a r ol i
n ah
a sm
a ny
st
at
el
aw
sw h i
ch
r eg
ul
at
e st
o rm
w
at
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op
m
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, a s s e e ni
nF
i
g
u r e3
, a nd
a sl i
st
ed h
e r e :(
1
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t
h
eN
e u s eR
i
v e rB
a si
n a nd
T
a r-P
am l i
c oB
a si
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ut
ri
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S
e n si
t
i
v eW
at
e r sM
a n ag
em
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r og
r am
(
r eq
ui
r e s n ut
ri
e nt
-r e
d
u ci
ng
B
M
P
s)
;
(
2
)
C
o a st
al C
o u nt
i
e s(
r eq
ui
r e sC
o a st
al
A
r e a sM
a n ag
em
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A
ct
(
C A
M
A
)
p
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t
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ed i m
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at
i
o n/
E
r o si
o nC
o nt
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a n , a nd
sp
e ci
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e a s u r e sf
o r sh
el l f
i sh
a r e a s)
;
E
r o sio n
C
o nt
r ol
P l
a n)
;
(
4
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W
at
e rSu
p p
l
y
W
at
e r sh
ed
P
r ot
e ct
i
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r og
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(
B
M
P
a nd
m
a xi m
um d
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r eq
uir e
m
e nt
sb
a s ed
o nw
at
e r s up p
l
y
cla s s
i f
i c at
i
o n)
;
(
5
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4 0
1
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ate r
Q
u al it
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e rt
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i c ati
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ap p l i
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et
l
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s an
w
at
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t
h
eSt
at
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;
(
6
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U
niv e r s a
l
S
t
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w
at
e rM
a n ag
em
e nt
Pr o
g
r am
(
v ol
u nt
a ry p
r og
r am
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;
(
7
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Im
p
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o u sV
eh
i
c ula r
P
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eg
i
sl
at
i
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al
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u nd
e r a ny
ot
h
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o n s)
, a nd
(
8
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N
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