DEFINITIONS
Maximum Contamination Level Goal (MCLG): The level of a contaminant in drinking water below which there is no known or expected risk to health.
Maximum Contamination Level (MCL): The highest level of a contaminant that is allowed in drinking water.
Variance or Exemption: State or U.S. EPA permission not to meet an MCL or a treatment technique under certain conditions.
Treatment Technique: A required process intended to reduce the level of a contaminant in drinking water.
Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements
which a water system must follow.
Listed below are the contaminants detected in Hallowell Water District's water during. All are below allowed levels. Not listed are the other contaminants for which we tested that were not detected.
INORGANIC CHEMICALS
TEST RESULTS
Contaminant
MCLG
MCL
Highest
Date
Likely Source of
Level
Tested
Contamination
Detected:
ARSENIC
0 ppm
10 ppb
1.2ppb
01/31/06
Erosion of natural deposit.
Runoff from Orchards, grass
and electronic production
wastes. BARIUM
2 ppm
2 ppm
0.018
ppm
11/20/06
Erosion of natural deposit.
ppm
Discharge of drilling wastes.
Discharge from metal
refineries. NITRATE NITROGEN
10 ppm
10 ppm
1.1 ppm
3/21/07
Erosion of natural deposit.
Runoff from fertilizer use.
Leaking from septic tanks,
sewage.
Chromium
100 ppb
100 ppb
0.6 ppb
4/21/05
Discharge from steel (total)
and pulp mills. Erosion
of natural deposits