3 Del. Admin. Code § 303-10.0 - Regular Testing of Water Supply

10.1 The water supply for a dairy operation that produces raw milk for human consumption under a raw milk permit must be safe and sanitary.

10.2 The water supply for a dairy operation that produces raw milk for human consumption under a raw milk permit shall be tested at least once every 6 months and whenever any repair or alteration is made to the water supply system. This testing shall be at the permit holder's expense. If the water supply is through a public or municipal water system, this testing requirement does not apply.

10.3 Testing shall be required to determine compliance with the applicable sections of 16 DE Admin. Code 4462 Public Drinking Water Systems.

10.4 The water testing described in this section must include bacteriological examinations to determine whether the water is bacteriologically safe. Water is bacteriologically safe if it meets the requirements in Section 8.0 and Section 10.0 of this regulation relating to sanitation; and regular testing of water supply. The requirement of a bacteriologically safe water supply is also applicable to recirculated cooling water if the dairy farm uses a recirculated cooling water system for milk cooling.

10.5 The water supply must contain a Most Probable Number of Coliform Organisms (MPN) of less than 2.2-per-100-milliliters by the multiple tube fermentation method or less than 1-per-100-milliliters by the membrane filter technique or the chromogenic substrate technique.

10.6 The water testing described in this section shall be conducted at a qualified, EPA certified laboratory.

10.7 The permit holder shall retain all records of required water tests for 3 years and make these available for inspection upon request of the Department.

Notes

3 Del. Admin. Code § 303-10.0

28 DE Reg. 871 (6/1/2025) (Final)