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Why Spreadsheets Break Down for SGMA Water Accounting
Common failure points when GSAs manage allocations, usage, and credits in Excel — and what to do instead.
Many GSAs start SGMA accounting in spreadsheets. That is reasonable for early pilots — until complexity outgrows the model.
Where spreadsheets fail
- Version control — multiple staff editing different copies of the same water year
- Formula drift — allocation rules change but old tabs still calculate incorrectly
- Transfer tracking — credits moved between parcels without a clear audit trail
- Grower statements — manually assembled PDFs that do not match the master sheet
- Historical lookups — prior water years archived in folders, not queryable
Signs it is time to move
- Staff spend days reconciling balances before board meetings
- Grower disputes take hours because the source record is unclear
- Consultants need read-only access but receive exports instead
- Reporting to DWR or partner agencies requires manual assembly
A practical migration path
GSAs do not need to replace every process at once. Start with one water year of parcel balances in structured software, then add grower portals and transfer workflows.
See water accounting on the GSA Water Dashboard for how agencies implement this transition.
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