Primary affected parties are agencies and operators involved in aerial firefighting and water quality regulation. The Forest Service and its Qualified Products List are explicitly referenced, so Forest Service land managers and procurement/operations staff will have clearer statutory linkage when they use listed products. Aerial application contractors and firefighting pilots may see reduced uncertainty about whether the statute addresses their discharges; this can influence permitting discussions and documentation they provide to regulators. State and federal water regulators (including permit writers at EPA or delegated state agencies) gain clearer statutory text to guide review and interpretation of discharges associated with aerial fire suppression. Public water systems and downstream communities may be indirectly affected because clearer statutory language can affect how regulators evaluate and condition activities that can result in water discharges; however, the amendment does not itself change water quality limits, enforcement authority, or funding for monitoring or remediation. Overall, the change reduces legal ambiguity but does not by itself impose new obligations, appropriate funds, or alter environmental standards — practical effects will depend on subsequent regulatory interpretation and agency practice.