How the change works
- 01 / Public decision
Financing and standards
- 02 / Physical change
Actual treatment
- 03 / Possible outcome
Verified water quality
Financing treatment can improve water, but the result requires functioning systems and upstream and downstream measures.
Research and local documents ↓What the evidence tells us
Keiser and Shapiro evaluate Clean Water Act funding and changes in U.S. water quality. The study distinguishes overall trends, investment effects, and costs.
Putting the choices into practice
Investment
The challengeSpending mistaken for results
The responseSystem in working order
Indicator
The challengeJudging water by appearance
The responseUpstream and downstream parameters
Balance
The challengeA single economic benefit
The responseSeparate costs and benefits
The diagram compares choices and conditions for putting them into practice. Measured outcomes and their limits are discussed in the evidence.
Research and local documents ↓Conditions and limits
The 12-percentage point aggregate increase in fishable water is not all attributable to funding. Real estate values do not exhaust all environmental and health benefits.
Other possible benefits
More reliable water services and better usability of watercourses.
Research and local documents
- Local document and reported findingKeiser and Shapiro · Consequences of the Clean Water Act and the Demand for Water Quality ↗
Research on the case, mechanism, or measures discussed in the sheet.
- Local project or policy documentUS EPA · Summary of the Clean Water Act ↗
Regulatory Framework on Discharges and U.S. Water Standards.
