Vieques Aquifer & Engineering Hub — Hydrogeological Reference
ENGINEERING REFERENCE ONLY. This page is a secondary compilation of federal and public records about the groundwater system beneath Vieques, Puerto Rico. It is intended for engineers, geologists, water resource researchers, and informed members of the public. It is not a regulatory document, a water-quality certification, or a potability assessment.
IMPORTANT DISCLAIMER: Live USGS telemetry on this page reports groundwater level trends (feet below land surface) only — it does not measure water chemistry, contamination, or potability. Chemistry and clearance statements are historical (ATSDR 2001 field assessment and other archived sources) and may not reflect current conditions. Do not rely on this page for drinking-water safety, public health guidance, construction decisions, or regulatory compliance — verify all data with USGS, ATSDR, PRASA, EPA, and licensed professionals.
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Monitoring Well Registry — Archival Status (ATSDR 2001)
All status designations below reflect the ATSDR 2001 field assessment. No subsequent public reassessment is reflected in this dataset. Verify current status with ATSDR, PRASA, or a licensed water quality professional before any operational reliance.
| Well ID | Location | Aquifer | Agency | Archival Status (2001) | Notes |
|---|
| USGS-VIE-A1 | Esperanza Valley, South-Central | Esperanza Alluvial | USGS | MONITORING | Primary USGS observation well — Esperanza basin hydrogeology study and finite-difference modeling calibration |
| SB-1 | Sun Bay, South Coast | Esperanza Alluvial | ATSDR / PRASA | HISTORICAL CLEARANCE (2001) — conditions may have changed | ATSDR 2001: biochemically stable — designated emergency municipal reserve. No subsequent public reassessment in this dataset. |
| SB-2 | Sun Bay, South Coast | Esperanza Alluvial | ATSDR / PRASA | HISTORICAL CLEARANCE (2001) — conditions may have changed | ATSDR 2001: biochemically stable — designated emergency municipal reserve. No subsequent public reassessment in this dataset. |
| SB-3 | Sun Bay, South Coast | Esperanza Alluvial | ATSDR / PRASA | HISTORICAL CLEARANCE (2001) — conditions may have changed | ATSDR 2001: biochemically stable — designated emergency municipal reserve. No subsequent public reassessment in this dataset. |
| B-1 to B-4 | North-Central distribution zone | Resolución Alluvial | ATSDR / PRASA | HISTORICAL CLEARANCE (2001) — conditions may have changed | ATSDR 2001: cleared — backup municipal distribution network nodes during PRASA pipeline interruption. No subsequent public reassessment in this dataset. |
| NAVFAC-NW-01 | Resolución Valley, Northwestern (NASD perimeter) | Resolución Alluvial | U.S. Navy NASD / NAVFAC | HISTORICAL | Remedial investigation: clay-rich saprolite transitions to plutonic bedrock at ~34 ft BLS; saturated zone sits above transition |
| NAVFAC-CG-01 | Camp Garcia, Eastern Vieques | Bedrock Fissured | U.S. Navy / NAVFAC | HISTORICAL | Static head monitoring — 25 gal/min restriction imposed; surrounding alluvial zones went dry rapidly above threshold, confirming low-transmissivity mechanics |
| WL-3-7 | Up-slope inland zone (private shallow) | Vadose / Shallow bedrock | ATSDR | ANOMALY — TREATMENT REQUIRED | ATSDR 2001: NO3- + NO2- above health-protective limits — livestock runoff origin confirmed; not suitable for supply without treatment. Historical 2001 result — current concentrations unknown. Do not rely on this finding without current certified water sampling and a licensed treatment engineering review. |