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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

The Most Polluted Communities

11,173 water utilities reported detecting Arsenic (total) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Arsenic (total) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Tacna Water Co
Yuma, AZ
2401 of 130 ppb
(30 ppb)
2Kingston Apartments
Rancho Santa Fe, MI
501 of 130 ppb
(30 ppb)
3Maverick Subd Lasher Construction
Caldwell, ID
902 of 230 ppb
(30 ppb)
4Preston Manor
NY
404 of 430 ppb
(30 ppb)
5City of Devils Lake
Devils Lake, ND
7,2227 of 730 ppb
(30 ppb)
6City of Linden
Linden, MI
2,8012 of 229.67 ppb
(29.33 to 30 ppb)
7Denlar Apartments - Buildings 17 & 19
Killingworth, CT
363 of 329.33 ppb
(28 to 30 ppb)
8KB Water Association
Soldotna, AK
1701 of 129.3 ppb
(29.3 ppb)
9Sunny Acres Nursing Center
Bad Axe, MI
302 of 229 ppb
(28 to 30 ppb)
10Spring Creek Mhp
Pahrump, NV
4,1462 of 229 ppb
(28.67 to 29.33 ppb)
11Lathrop Sands Trailer Court
Lathrop, CA
1057 of 729 ppb
(27 to 30 ppb)
12Kittitas County Water District #5
Cle Elum, WA
6002 of 228.85 ppb
(27.7 to 30 ppb)
13Monterey Park Tract Community Service Di
Ceres, CA
1866 of 628.78 ppb
(26 to 30 ppb)
14City of Prescott
Rainier, OR
752 of 228.5 ppb
(28 to 29 ppb)
15Paul Cobb Water System
Lubbock, TX
404 of 428.43 ppb
(28.1 to 28.9 ppb)
16Heartland Place
Epsom, NH
551 of 128.1 ppb
(28.1 ppb)
17Loop Wsc
Loop, TX
3506 of 628.02 ppb
(26.2 to 29.2 ppb)
18Montezuma Rimrock Wc, Llc
Rim Rock, AZ
4561 of 128 ppb
(28 ppb)
19Nps - Death Valley, Grapevine Rs
Death Valley,, CA
111 of 128 ppb
(28 ppb)
20Kingman Water Works
Kingman, IN
5102 of 228 ppb
(28 ppb)