Programs that have their own independent water supply and are not considered to be public water systems as defined in RSA 485:1-a, XV and confirmed by DES, shall test their water supply in accordance with the following: a. Water testing shall be performed by a laboratory accredited under the environmental laboratory accreditation program in accordance with Env-C 300; b. For new applicants, not more than 90 days prior to the date the application is submitted to the department, water testing shall be conducted for arsenic, bacteria, nitrate, nitrite, lead, both stagnant and flushed, copper, both stagnant and flushed, and fluoride, and results provided to the department with the application; and c. Ongoing water testing shall be conducted as follows and results maintained on file at the program, available for review by the health officer and the department: 1. Once every 3 months for bacteria; 2. Annually for arsenic, nitrate, and nitrite; and 3. At least once every 3 years for stagnant lead, stagnant copper, and fluoride.