Any technical information found on these pages is primarily intended for environmental health and water supply professionals. Others should be aware of the value of consulting professionals for selection and interpretation of the types of testing which will best address individual concerns. For systems analyzing fewer than 40 samples per month, no more than one sample per month may be positive for total coliforms. Cancer Heptachlor epoxide zero 0. MRDL may be exceeded on a short-term basis to address water quality problems.
Compliance is based on an annual average of monthly averages.