Confirm whether the public water system must participate in ADEQ’s Monitoring Assistance Program and which sampling is actually included. The contractor handles covered monitoring, but the system remains responsible for compliance and excluded tests. Keep owner, population, connection and operator information current, and confirm separate arrangements for any increased monitoring.
Is participation required for this system?
Arizona’s current R18-4-301 generally requires community and nontransient noncommunity systems serving 10,000 or fewer people to participate in baseline monitoring through ADEQ’s Monitoring Assistance Program (MAP), subject to the rule’s specific exceptions. Confirm the system’s classification, population and agency determination before assuming it is included or exempt.
The program overview uses “less than 10,000” wording, while the adopted rule states 10,000 or fewer. Use the rule and agency determination at that boundary rather than treating a system serving exactly 10,000 as automatically exempt. Systems not obligated to participate can request voluntary participation under the rule’s conditions and agency approval; it is not an automatic enrollment choice without further obligations.
What monitoring does the contractor cover?
ADEQ describes contracted collection, transportation, analysis and reporting of covered baseline samples. Match the actual system schedule and program arrangement to the required contaminants. Program participation is not evidence that every applicable sample has been collected.
R18-4-302 excludes copper, lead, disinfection byproducts, microbiological contaminants and contaminants monitored under a Surface Water Treatment Rule, such as turbidity, from the baseline contractor’s responsibility. These remain system duties. ADEQ’s overview also identifies residual-disinfectant monitoring as excluded. Arrange the responsible sampler, laboratory and reporting for those requirements rather than assuming MAP provides complete monitoring.
For separately arranged analyses, verify the laboratory’s certification and analytical scope. A lab’s general drinking-water listing does not establish that every required method is available.
What owner information and access remain necessary?
R18-4-303 expressly keeps legal compliance responsibility with the public water system. It also requires the owner’s annual information update by July 1, including applicable contact, population, system identification, service-connection and responsible-operator details. Use the current update instructions and report accurate information rather than carrying forward outdated counts.
The rule requires access for the contractor to collect covered samples. Coordinate site access and changes with the operator. Keep results and submission records so a missed visit or missing analysis can be identified while there is time to resolve it.
Does increased monitoring happen automatically through MAP?
ADEQ’s overview describes additional assistance for increased monitoring, with separate arrangements and invoicing. Confirm what the program has actually agreed to collect and what remains with the system. Do not infer participation in every additional service from payment of the baseline invoice.
A missed required sample or coliform-positive result still needs its applicable response. Keep the contractor agreement, monitoring schedule, excluded duties and event records together so outsourcing one part of monitoring does not leave the owner’s other obligations unattended.