Methodology
Our rehabilitation methodology begins with a thorough diagnostic assessment, including video inspection, step-drawdown testing, and water quality sampling. We employ mechanical brushing, chemical treatment with NSF-approved dispersants and acids, and high-velocity jetting (up to 4,000 psi) to remove encrustation and biofilm. In cases of severe clogging, we utilize surging and swabbing techniques. For well deepening or screen replacement, we deploy rotary drilling rigs. Our approach is tailored to site-specific conditions, referencing ASTM D5299 for well abandonment procedures when necessary. We coordinate with our Water Well Drilling division for integrated solutions.
Reference Technical Parameters
| Parameter | Reference Value |
|---|---|
| Well Depth Range | 50 – 1,500 ft |
| Screen Diameter | 4 – 24 in |
| Pumping Rate (after rehab) | 5 – 500 gpm |
| Turbidity Reduction | >90% typical |
| Chemical Treatment pH Range | 2.0 – 11.0 |
Local Considerations — USA
The United States presents diverse hydrogeological conditions that influence well maintenance strategies. In arid regions like Albuquerque, scale from calcium carbonate is prevalent, requiring acidizing treatments. In coastal areas such as Anchorage, iron bacteria and biofouling are common, necessitating specialized biocides. Our team adapts protocols for each region: in Akron, glacial till aquifers demand careful surging to avoid screen collapse; in Allentown, fractured bedrock wells often benefit from hydrofracturing. We maintain a fleet of mobile units to serve cities from Anchorage to Arlington, ensuring rapid deployment and minimal downtime.
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Applicable Standards
- AWWA A100-15 – Standard for Water Wells
- ASTM D5299 – Standard Guide for Decommissioning of Groundwater Wells, Vents, and Monitoring Wells
- NSF/ANSI 60 – Drinking Water Treatment Chemicals
- 40 CFR 141 – National Primary Drinking Water Regulations
Frequently Asked Questions
How often should a water well be inspected and maintained?
We recommend annual inspections for production wells, with a full performance test every 3-5 years. Signs of declining yield, increased pumping costs, or water quality changes indicate the need for immediate rehabilitation. Our team follows AWWA guidelines to schedule preventive maintenance.
What methods are used to diagnose well problems?
Diagnosis includes video camera inspection to assess screen condition and casing integrity, step-drawdown tests to evaluate specific capacity, and water sampling for bacteria, metals, and turbidity. Flow logging can identify zones of blockage. These data guide our rehabilitation design.
How long does a typical well rehabilitation take?
Most rehabilitation projects are completed in 2 to 5 days, depending on well depth, degree of fouling, and required chemical treatment. Deep or severely clogged wells may take up to two weeks. We provide a detailed schedule after the initial assessment.
How much does well maintenance and rehabilitation cost in the US?
Costs typically range from $1,050 to $4,200 per well, depending on depth, accessibility, and the extent of treatment needed. Additional services like screen replacement or hydrofracturing increase costs. We provide a firm quote after a site visit and diagnostic testing.