Section 385-840-6 - Drinking Water Standards for Existing Private Water Systems in Active Operation that are not Expanding, Upgrading, or Being Re-engineered1. Testing of each water system shall be performed annually, and the testing requirements rotate on a three-year cycle, as follows: A.Required Testing for the First Year of Each CycleMicroorganisms:
Total Coliform
Nitrate
Nitrite
B.Required Testing for the Second Year of Each CycleInorganic Chemicals:
Arsenic
Barium
Cadmium
Chromium (Total)
Copper
Fluoride
Lead
Nitrates (Measured as Nitrogen)
Nitrites (Measured as Nitrogen)
Selenium
Total Coliform
C.Required Testing for the Third Year of Each CycleMicroorganisms:
Total Coliform
Nitrate
Nitrite
Organic Chemicals:
Benzene
Carbon tetrachloride
Chlorobenzene
o-Dibromo-3-chloropropane
o-Dichlorobenzene
p-Dichlorobenzene
1,2-Dichloroethane
1,1-Dichloroethylne
cis-1,2-Dichloroethylene
trans-1,2-Dichloroethylene
Dichloromethane
1,2-Dichloropropane
Ethylbenzene
Styrene
Tetrachloroethylene
Toluene
1,2,4-Trichlorobenzene
1,1,1-Trichloroethane
1,1,2-Trichloroethane
Trichloroethylene
Vinyl chloride
Xylenes (total)
2. Untreated water samples shall be analyzed by a certified laboratory after a prolonged pump test.3. The Board may require additional water quality testing if there is reason to believe a contaminant may be or is present in the drinking water that would pose a risk to public health.4. Water systems with quality exceeding the maximum contaminant levels shall be required to come into compliance through the installation of treatment, blending with another source, or abandonment of the water source. The community may also address the contamination issue through the removal of the source of the contaminant and by demonstrating that the water quality is at or below the maximum contaminant level.02-385 C.M.R. ch. 840, § 6