For GSAs and watermasters
The wells behind the numbers you file.
Sustainability plans and adjudicated basin reports are built on extraction volumes, groundwater elevations and storage change. All three come from wells that somebody has to keep records for.
What Waterwell IQ contributes
- Monthly extraction per well, with measurement method and stated accuracy on every volume — because the annual report asks for both.
- Groundwater elevations with the full measurement envelope: reference point, ground surface elevation, method, measuring agency and no-measurement reason codes.
- The water year as a first-class period, so nothing has to be recomputed at filing time.
- Principal aquifer as a dimension on wells and on storage-change calculations.
- Screened intervals — which is what makes “which of our wells goes dry at the minimum threshold” a query rather than a study.
- Quarterly production where a watermaster requires it, and an append-only history so a correction never overwrites a figure already submitted.
The question nobody can currently answer from software. Minimum threshold analysis is fundamentally a comparison between a projected water level and a well’s screened interval. No work-order system stores the screened interval, which is why that analysis is a consulting engagement every time.
California
Your filing calendar, and the record each filing draws on.
The regulatory load in California falls on the agency, not the vendor. Waterwell IQ does not fill in or file these reports. It keeps the record they draw on — by water year, measured and estimated apart — so the numbers come from one place instead of a spring of spreadsheets.
| Due | Filing | What the record holds for it today |
|---|---|---|
| Feb 1 * | Probationary basin extraction report | Monthly extraction for each well over the water year, measured and estimated kept apart, with how each month was measured. |
| Apr 1 | GSP annual report | Extraction by well and month with its measurement method, and water levels with their dates. Totals by sector and storage change are not computed. |
| Apr 1 | Adjudicated basin annual report | The same monthly extraction by well, for you to total the way your watermaster asks. |
| Apr 1 | Electronic annual report | Every source well with its status — active, standby, inactive or destroyed — and its monthly production. |
| Oct 1 | Water loss audit | Source volumes by month and how each was measured. Meter accuracy and calibration dates are not held yet. |
| Rolling | Well completion report | The driller’s log read into the record — construction intervals and lithology — once the report is in hand. The sixty-day clock is not tracked. |
| Rolling | Public records request | A complete export of the district’s record in open formats, with its audit log. Redaction is done outside the platform today. |
* February 1 is the default, not your date. Water Code section 5202 sets an annual extraction report due February 1 for the preceding water year. But when the State Water Board places a basin on probation it sets that basin’s first deadline and first reporting period by order, and both of the basins currently on probation differ from this row. Tule reports 1 January to 31 December 2025; Tulare Lake reports 15 July 2024 to 30 September 2025. Both were due 1 May 2026, and neither period is a water year.
So read this calendar as the general shape of the year, not as your basin’s schedule. Waterwell IQ does not yet hold per-basin filing rules — the due date, reporting period and source for each filing are on the roadmap, not in the product — so confirm your own dates against the State Water Board order for your basin and the DWR guidance for your report. Dates on this page were checked against those sources on 8 September 2026.
Built on the water year. October to September, as a first-class period alongside calendar and fiscal years. It is the most common modeling mistake in groundwater software and it cannot be fixed later.
The state standard, checked on every well. The annular seal on record is checked against the DWR Bulletin 74-90 minimum for the well’s use. Many counties adopted stricter ordinances; those are not loaded yet, so a county’s own minimums still need your check.
How a GSA buys it
You are usually not the one holding the records
A GSA is an assembly of member agencies, and the wells belong to them. So the useful shape is rarely one subscription covering everything — it is member districts holding their own tenanted records, and each member giving the GSA’s staff access to its own record, by a grant of its own.
Members keep custody
Each district owns and controls its own data. Sharing with the GSA is a grant the district makes, at the access it chooses, and can withdraw; every grant and every withdrawal is logged. Nobody has to hand over a database to be counted.
A basin view is not built yet
Today GSA staff read each member’s record inside that member’s district, one district at a time, with the access it granted. One view across all the members — extraction, elevations by principal aquifer, storage change and the wells behind each figure — is not built; this page will say so when it is.
Who could see what, and when
A grant is withdrawn by stamping a date on it, never by deleting it, and every change to a well’s record is logged with who made it — so “who could see this in March” and “who changed that figure” both have answers when a member or the state asks.
Basin terms. Where a GSA brings its member districts in together, every member’s historical backfill is part of its onboarding, not just the lead agency’s. A basin-wide record is only worth having if it is complete.