Specific Capacity (SC) is the definitive measure of a well’s hydraulic efficiency. It is calculated by dividing the pumping rate (gpm) by the drawdown—the difference between the static and pumping water levels. While total yield only measures volume, SC identifies how easily the aquifer releases water, revealing the physical condition of the well screen and surrounding formation.

Why Monitor Specific Capacity?

Well performance degrades over time due to mineral encrustation, biofouling, or sediment accumulation. Monitoring SC enables data-driven maintenance:

• Preventative Action: Identifying a 10–25% decline allows for high-success, lower-cost cleaning.

• Avoiding Failure: Waiting for a decline greater than 50% often results in permanent capacity loss or mechanical pump failure.

How to Use the Analyzer

1. Baseline: The tool compares current data against an established baseline (e.g., 14.2 gpm/ft) to calculate efficiency loss.

2. Enter Data: * Pumping Rate (Q): Current flow in gallons per minute.

   • Static Water Level: Water depth while the pump is off.

   • Pumping Water Level: Stabilized water depth during operation.

3. Analyze Results: Click Calculate SC to determine your status:

   • Good (<10% drop): Well is near baseline; continue annual monitoring.

   • Fair (25–50% drop): Significant decline; begin redevelopment planning.

   • Poor (>50% drop): Critical decline; immediate rehabilitation required.

Use the Trend & History tab to view longitudinal data. Comparing current tests against historical figures distinguishes temporary seasonal fluctuations from actual mechanical degradation.

Seeing a decline in your SC or not sure where your well stands? Call Maher at (976) 664-9355 or Contact Us for a professional well performance evaluation.