EWG INVESTIGATION
Findings
About The Data
News Release
EWG Statement, 03/10/2008
Related News Clips
WHAT'S IN YOUR WATER?
Find Your Water Company
NATIONAL SUMMARY
Quality Varies Across the U.S.
CONTAMINANTS DATABASE
Find a Contaminant
Credits
Sign up to receive email updates from EWG
|
|
Return to National Report
National Contaminants of Concern
<Previous Page Next Page > | Rank | Contaminant Name | Population Exposed
(of 231,439,195) | Number of Water Systems
(of 39,751) | Number
of States
with Detections
(of 42) |
|---|
| At Any Level | Above Health Limits
See Note | At Any Level | Above Health Limits
See Note |
|---|
| 21 | Radium-226
Regulated | 27,743,117 | 199,924 | 3,692 | 101 | 14 | | Radioactive element usually found around uranium deposits | | 22 | Perchlorate
Unregulated | 25,695,316 | 211,734 | 83 | 8 | 2 | | Perchlorate is an oxygen additive in solid fuel propellant for rockets, missiles, and fireworks. | | 23 | Tetrachloroethylene
Regulated | 23,620,746 | 18,274,300 | 658 | 536 | 40 | | Pollutant from dry cleaning and various industrial factories | | 24 | Dichloroacetic acid
Regulated | 23,450,397 | 56,905 | 1,437 | 26 | 6 | | Disinfection by-product | | 25 | Molybdenum
Unregulated | 23,042,880 | 5,073,250 | 124 | 84 | 3 | | By-product of copper and tungsten mining, used as a alloy for various metals, occurs naturally in soil and rock | | 26 | Chromium (total)
Regulated | 22,625,442 | 6,172 | 1,449 | 5 | 4 | | Discharge from steel and pulp mills; erosion of natural deposits | | 27 | Trichloroethylene
Regulated | 19,191,558 | 1,649,022 | 503 | 95 | 26 | | Pollutant from metal degreasing sites | | 28 | Atrazine
Regulated | 18,701,355 | 7,166,329 | 683 | 345 | 21 | | Herbicide used on row crops | | 29 | Combined Radium (-226 & -228)
Regulated | 16,474,702 | 428,196 | 1,908 | 141 | 12 | | Radioactive element usually found around uranium deposits | | 30 | Di(2-ethylhexyl) phthalate
Regulated | 16,085,626 | 1,507,591 | 1,141 | 465 | 33 | | Pollutant from rubber and industrial chemical factories; leachate from PVC pipes | | 31 | Mercury (total inorganic)
Regulated | 12,540,558 | 439,339 | 713 | 37 | 16 | | Metal from refinery and factory pollution; coal burning; landfill and agricultural runoff; erosion of natural deposits | | 32 | Thallium (total)
Regulated | 10,329,788 | 6,953,626 | 887 | 614 | 31 | | Widely used as a rodenticide and ant killer; home use has been banned; used for speciality glass manufacture | | 33 | Carbon tetrachloride
Regulated | 9,761,149 | 1,587,805 | 324 | 182 | 32 | | Pollutant from various chemical plants | | 34 | 1,1-Dichloroethylene
Regulated | 9,545,402 | 5,505,679 | 137 | 103 | 25 | | Pollutant from producing adhesives, synthetic fibers, refrigerants, and plastic wraps | | 35 | Cadmium (total)
Regulated | 9,471,004 | 5,093,254 | 1,364 | 1,040 | 34 | | Metal from corrosion of galvanized pipes; runoff from metal refineries, waste batteries and paints; erosion of natural deposits | | 36 | Radium-228
Regulated | 9,375,740 | 130,784 | 1,891 | 52 | 13 | | Radioactive element usually found around uranium deposits | | 37 | Dibromoacetic acid
Regulated | 8,716,589 | 50,629 | 283 | 4 | 4 | | Disinfection by-product | | 38 | Combined Uranium (mg/L)
Regulated | 6,997,024 | 5,391,194 | 620 | 292 | 11 | | Radioactive element commonly found in most rocks; processed ore used for power generation and weapons manufature. | | 39 | 1,2 Dibromo-3-chloropropane (DBCP)
Regulated | 6,492,596 | 4,388,732 | 178 | 163 | 15 | | Fumigant used on soybeans, cotton, pineapples and orchards | | 40 | Asbestos
Regulated | 6,328,786 | 6,748 | 27 | 2 | 2 | | Mineral fiber from decay of asbestos cement in water mains |
<Previous Page Next Page >
|
