Portland, Oregon, often referred to as the “City of Roses,” is known for its lush green landscapes and its commitment to sustainability. With an average annual rainfall of around 36 inches, the city is well-suited for rainwater harvesting. In this article, we will explore the concept of collecting rainwater for drinking purposes in Portland, highlighting the benefits, regulations, and steps to ensure a safe and sustainable rainwater collection system.

The Benefits of Rainwater Harvesting in Portland

  1. Sustainability: Rainwater harvesting is an eco-friendly practice that reduces the demand on municipal water supplies and eases the strain on local ecosystems, especially during dry spells.
  2. Cost Savings: By collecting rainwater, homeowners can significantly reduce their water bills, as rainwater can be used for various household purposes, including drinking.
  3. Water Quality: Rainwater is naturally soft and devoid of the chemicals typically found in municipal water supplies. This can lead to better-tasting and healthier drinking water.
  4. Reduced Runoff: Harvesting rainwater helps mitigate flooding and soil erosion, which can be significant issues in rainy regions like Portland.

Regulations and Guidelines

Before setting up a rainwater harvesting system for drinking water in Portland, it’s crucial to be aware of local regulations and guidelines. As of my last knowledge update in September 2021, here are some key considerations:

  1. Water Rights: In Oregon, water rights are highly regulated, and collecting rainwater might be subject to certain restrictions. While limited rainwater harvesting for non-potable uses is generally allowed, it’s essential to check with the Oregon Water Resources Department for any updates or changes to regulations.
  2. Quality Standards: If you intend to use rainwater for drinking, it must meet water quality standards. Installing a robust filtration and purification system is crucial to ensure the water’s safety.
  3. Permitting: Depending on the size and complexity of your rainwater harvesting system, you may need permits or approvals from local authorities. Contact the Portland Bureau of Environmental Services or relevant local agencies to determine the necessary permits.

Steps to Collect Rainwater for Drinking

  1. Assess Water Quality: Before using rainwater for drinking, have it tested for contaminants. If the initial tests show issues, consider installing a robust filtration and purification system that includes UV treatment, carbon filters, and possibly reverse osmosis to ensure the water meets drinking water standards.
  2. Select Appropriate Collection Surfaces: Ensure that your roof or collection surfaces are clean and free from contaminants like bird droppings, debris, or chemicals that could contaminate the rainwater.
  3. Install a First Flush Diverter: This device diverts the initial runoff, which may contain pollutants, away from the storage tank.
  4. Storage Tanks: Invest in high-quality, food-grade storage tanks to store the collected rainwater. Ensure the tanks are sealed to prevent insect infestations and algae growth.
  5. Filtration and Treatment: Install an effective filtration and purification system to remove impurities and ensure the water’s safety for drinking.
  6. Regular Maintenance: Maintain your rainwater harvesting system by cleaning gutters, filters, and storage tanks regularly. Regular maintenance is crucial to the system’s efficiency and water quality.
  7. Monitor Usage: Keep track of your rainwater usage and switch to municipal water when the rainwater supply is low or during extended dry periods.

How To Collect Rain Water For Drinking in Portland, OR

Collecting rainwater for drinking in Portland is an environmentally friendly and cost-effective way to tap into the city’s abundant rainfall. However, it’s essential to be aware of local regulations and take appropriate measures to ensure the water’s safety and quality. By following the guidelines, you can enjoy the benefits of sustainable, clean, and delicious rainwater while contributing to the city’s commitment to environmental responsibility. Be sure to check for any updates to regulations since my last knowledge update in September 2021, as laws and guidelines may change over time.