1. (a) The owner of a PWS classified in Env-Dw 401 as a CWS or NTNC shall:

   1. (1) Notify the department as specified in (a)(2) below, within 24 hours after discovery of any impairments or disruptions that reduce the PWS’s ability to continue delivering safe drinking water, including the following:

      1. a. Actual or suspected tampering, sabotage, security breach, or any suspicious incident at the water system;
      2. b. Damage to or depletion of the source of the supply or water system facilities which impairs the quality or sufficiency of the supply;
      3. c. Interruption of service of a pressure zone, or the entire water system due to an extended power outage, line break, or other event that causes a disruption of the ability of the PWS to continue delivery of safe drinking water;
      4. d. Inability to obtain chemicals required to operate the treatment system due to supply chain issues; or
      5. e. Staff shortages; and
   2. (2) Provide the notice to the department required by (a)(1) above by telephone, email, or other available means of confirmable, rapid communication.

2. (b) Subject to (d) below, if the impairment is anticipated to last more than 48 hours, the system owner specified in (a) above shall notify affected customers within 48 hours of the impairment of:

   1. (1) What the impairment is;
   2. (2) The corrective actions taken or planned; and
   3. (3) The expected timeframe for resolution.

3. (c) The PWS owner specified in (a) above shall provide the notice to customers required by (b) above, by:

   1. (1) Using reverse-911 or similar automated mechanism for contacting customers, if available; or
   2. (2) In writing, if the water system does not have reverse 911 or other automated mechanism for contacting customers; and
   3. (3) Providing a copy of the recorded or written notice to the department within 30 days of providing the notice to customers.
4. (d) If the PWS owner specified in (a) above is a political subdivision and its local legislative body has not voted or does not vote to approve funding for the notification required by (b) above, and the notification is not fully funded by the state, the owner shall not be required to provide the notice.
5. (e) In addition to (a) through (d) above, the owner of a CWS shall implement the appropriate actions as specified in the water system’s emergency plan required by Env-Dw 503.24.

Source. (See Revision Note at part heading for Env-Dw 503) #10465, eff 12-2-13; ss by #14006, eff 6-25-24 (formerly Env-Dw 503.02)