Benton County Washington

CONTAMINANTS                   MCLG         MCI        PWD WATER   VIOLATION

Chlorine                                       4                4                     1.6                     NO

Trihalomethanes                     NA             80                     0                       NO

Nitrate                                        10              10                  11.3                    YES

Coliform *                                    0                0                      0                       NO

Benzene                                       0                5                      0                       NO

1,2-Dichloroethane                   0                5                      0                       NO

1,2-Dichloropropane                0                5                      0                        NO

Ethylbenzene                           700            700                   0                        NO

1,2,4-Trichlorobenzene          70              70                     0                        NO

1,1,2-Trichloroethane              3                5                      0                        NO

Trichloroethylene                     0                5                      0                        NO

*Coliform is tested monthly

DEFINITIONS:

MCLG - Maximum Contaminant Level Goal.  The level of a contaminant in drinking water below which there is no know or expected risk to health.  MCLG's allow for a margin of safety.

MCL - Maximum Contaminant Level.  The highest level of a contaminant that is allowed in drinking water.  MLC's are set as close to the MCLG's as feasible using the best available treatment technology.