State

2010

2005

2015

Census Data

Violations

TTHM

Violations

TTHM

Population

Income

Systems

Total

TTHM

[ppb]

Total

TTHM

[ppb]

% Change

AK

Alaska

710,231

$64,576

1556

3687

64

15.8

4527

42

40.0

153.2%

AZ

Arizona

6,392,017

$46,789

1573

5018

19

17.3

3637

3

61.0

252.6%

CA

California

37,253,956

$57,708

7781

2205

98

27.0

2473

103

68.3

153.0%

CO

Colorado

5,029,196

$54,046

1975

1325

64

31.5

3379

39

59.0

87.3%

HA

Hawaii

1,360,301

$63,030

130

47

NR

NR

5

NR

NR

NR

ID

Idaho

1,567,582

$43,490

1957

887

2

22.1

1851

2

75.0

239.4%

MT

Montana

989,415

$42,666

670

3914

0

40.0

6810

44

71.0

77.5%

NV

Nevada

2,700,551

$51,001

558

815

198

33.0

752

2

73.0

121.2%

NM

New Mexico

2,059,179

$42,090

1195

860

9

22.0

1587

13

45.0

104.5%

OR

Oregon

3,831,074

$46,560

1130

3483

3

27.7

4360

6

78.1

181.9%

UT

Utah

2,763,885

$54,744

1022

1936

0

21.0

3945

2

62.0

195.2%

WA

Washington

6,724,540

$55,631

4133

10,399

12

22.3

4069

76

50.0

124.2%

WY

Wyoming

563,626

$53,512

787

233

9

24.0

215

2

68.0

183.3%