Which statement is true about changes to public water systems?

Which statement is true about changes to public water systems?

• A. The molecular formula HO2.
• B. The hydrologic cycle is the natural exchange of water between the earth and the atmosphere.
• C. Surface water comes from rivers, lakes, and reservoirs.
• D. The state must be notified about changes to public water systems involving water source, water quality, and health hazards.

Answer: (D)

Public water systems are regulated to protect drinking water, and any changes that could affect the source, quality, or safety of the water trigger oversight. The statement that the state must be notified about changes to the water source, water quality, and health hazards is the true one because state drinking-water programs review these changes to ensure they won’t compromise public health. This allows for permit updates, risk assessment, and any needed corrective actions before the changes go into service, plus ongoing monitoring and communication with the public as needed. The other options don’t address this regulatory requirement: one is just a chemical formula, another describes the hydrologic cycle, and another states where surface water comes from—facts, but not about notifying the state of changes to a public water system.

Public water systems are regulated to protect drinking water, and any changes that could affect the source, quality, or safety of the water trigger oversight. The statement that the state must be notified about changes to the water source, water quality, and health hazards is the true one because state drinking-water programs review these changes to ensure they won’t compromise public health. This allows for permit updates, risk assessment, and any needed corrective actions before the changes go into service, plus ongoing monitoring and communication with the public as needed. The other options don’t address this regulatory requirement: one is just a chemical formula, another describes the hydrologic cycle, and another states where surface water comes from—facts, but not about notifying the state of changes to a public water system.