Published with permission, here is what Dr. Bob Knight ferreted out from USGS and the WMDs about groundwater pumping.

You’d think they would publish this information, but since they didn’t, WWALS is.

These slides (PowerPoint or PDF) don’t say anything about Water First North Florida (WFNF), the WMD and JEA plan to pipe treated wastewater from Jacksonville into the Suwannee Basin, but this is the groundwater background to WFNF.

https://wwals.net/issues/wfnf

Floridan Aquifer Groundwater Pumping Is Getting Worse –Dr. Bob Knight 2026-05-09

He sent these slides to various environmentalists on May 9, 2026, with this note. I asked him later in person if he minded WWALS publishing. He said go ahead.

All

Attached is an updated summary of Florida groundwater wells, permits, and reported extraction quantities from the Floridan aquifer. All data were provided by the water management districts and the USGS. But the summaries of those reams of data are my work and may not be complete and accurate in all cases. Surprisingly, the WMDs have differing data bases and few detailed summaries of these data. For now, I believe these may be the best data summaries out there. Historically (up to 2015) Richard Marella formerly with USGS reported a lot of Floridan aquifer detailed/summary data every five years. That important contribution ended in 2015 and there is no sign that it will be picked back up by the state or the USGS.

The inconvenient truth is that all groundwater extractions reduce spring flows and that data analysis indicates that the ratio is almost one to one. Measured spring flow reductions closely mirror these reported pumping totals and differ widely from groundwater flow model estimates.

Please let me know if you have any questions.

Best wishes,

Bob

Slides

Florida Springs and Aquifer Dilemma
PDF

Drops

Withdrawals from the Floridan Aquifer in 2015
PDF

Future

The Drawdown Problem is Projected to Get Worse
PDF

SRWMD Withdrawals

Suwannee River Water Management District
PDF

SJRWMD Withdrawals

St. Johns River Water Management District
PDF

SWFWMD

SWFWMD Southwest Florida Water Management District
PDF

NWFWMD

NWFWMD Northwest Florida Water Management District
PDF

 -jsq, John S. Quarterman, Suwannee RIVERKEEPER®

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