1. Water Availability in Anacortes

Many properties within Anacortes city limits are served by municipal water. Private wells are more common on:

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• Larger rural parcels

• Guemes Island

• Homes outside municipal service areas

• Older properties that pre-date service expansion
   

Before drilling, we evaluate:

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• Municipal water availability

• Basin-level water requirements

• Parcel-specific siting constraints

• Department of Ecology well construction standards
   

All new wells require a 72-hour Notice of Intent (NOI) filing with the Department of Ecology, which we handle as part of our service.

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2. Geology of Fidalgo Island: Fractured Rock Aquifers

The Fidalgo Ophiolite

Anacortes sits on volcanic and metamorphic rock formations commonly referred to as the Fidalgo Ophiolite. These formations do not hold water uniformly like sand or gravel aquifers.

Instead, water is found in:

• Small fractures

• Fault lines

• Weathered zones within bedrock
   

Finding water requires precision drilling and experience interpreting rock formations.

Typical Island Well Characteristics

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• Typical Depth: 150–450 feet

• Static Water Level: Often 50–200 feet depending on elevation

• Yield Expectations: Frequently 2–10 GPM
   

Lower yields are common in bedrock environments — which is why proper system design is critical.

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3. Low-Yield Well Management

On Fidalgo Island, reliability often matters more than raw gallons per minute.

Atmospheric Storage Systems

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If a well produces 2–5 GPM, that may not be enough for peak demand. We frequently install:

• 1,000–3,000 gallon atmospheric storage tanks

• Booster pump systems

• Constant pressure controls
   

This allows the well to refill the tank slowly throughout the day while providing strong water pressure when needed.

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4. Coastal & Saltwater Intrusion Considerations

In shoreline-adjacent areas, freshwater exists in balance with surrounding marine water. Over-pumping or improper depth targeting can increase the risk of drawing brackish water into the well.

To reduce this risk, we focus on:

• Proper casing and grout sealing

• Conservative pump sizing

• Monitoring water quality during development

• Chloride testing when site conditions warrant
   

Not all Anacortes wells experience saltwater issues — but proactive design helps protect long-term water quality.

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5. Water Quality in Anacortes Wells

Hard Water & Mineralization

Water flowing through volcanic bedrock often contains elevated minerals. Hardness and scale buildup are common concerns.

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Arsenic

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Naturally occurring arsenic can be present in some Puget Sound bedrock wells. Periodic water testing is recommended. If elevated levels are detected, certified adsorption or Reverse Osmosis (RO) systems can reduce concentrations below the 10 ppb drinking water standard.

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Low Nitrate Risk

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Unlike agricultural floodplain areas, island wells typically have lower nitrate exposure  though routine testing is still advised.

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