LED bulbs use 75% less energy than incandescent bulbs — DOE
    Turning off lights when leaving saves $30-50/year per household — ENERGY STAR
    Standby power ('vampire load') can account for 5-10% of home energy use — DOE
    ENERGY STAR certified TVs use 25% less energy than standard models
    Programmable thermostats can save about 10% on heating/cooling — DOE
    Sealing air leaks can save 10-20% on heating and cooling costs — ENERGY STAR
    Heat pumps can reduce heating energy use by 50% vs. electric resistance — DOE
    Ceiling fans allow you to raise AC settings 4°F with no comfort loss — DOE
    Heating water accounts for about 18% of home energy use — DOE
    Low-flow showerheads save 2,700 gallons/year for a family of four — EPA
    Washing clothes in cold water can save $60+/year on water heating — ENERGY STAR
    Fixing a leaky faucet can save 3,000+ gallons/year — EPA
    ENERGY STAR refrigerators use 9% less energy than standard models
    Clean refrigerator coils annually for optimal efficiency — DOE
    Air-drying dishes instead of heat-dry saves 15-50% on dishwasher energy — DOE
    Proper attic insulation can cut heating/cooling costs by 15% — ENERGY STAR
    Windows can account for 25-30% of home heating/cooling energy use — DOE
    Window film can reduce solar heat gain by up to 70% — DOE
    Average US home solar system offsets 3-4 tons of CO₂ annually — EPA
    Solar panel costs have dropped 70%+ over the past decade — SEIA
    EVs cost about 60% less to fuel than gas vehicles — DOE
    Proper tire inflation improves gas mileage by 0.6% on average — DOE
    The average US household spends $2,000+/year on energy — EIA
    ENERGY STAR products have saved Americans $500 billion on energy bills
    LED bulbs use 75% less energy than incandescent bulbs — DOE
    Turning off lights when leaving saves $30-50/year per household — ENERGY STAR
    Standby power ('vampire load') can account for 5-10% of home energy use — DOE
    ENERGY STAR certified TVs use 25% less energy than standard models
    Programmable thermostats can save about 10% on heating/cooling — DOE
    Sealing air leaks can save 10-20% on heating and cooling costs — ENERGY STAR
    Heat pumps can reduce heating energy use by 50% vs. electric resistance — DOE
    Ceiling fans allow you to raise AC settings 4°F with no comfort loss — DOE
    Heating water accounts for about 18% of home energy use — DOE
    Low-flow showerheads save 2,700 gallons/year for a family of four — EPA
    Washing clothes in cold water can save $60+/year on water heating — ENERGY STAR
    Fixing a leaky faucet can save 3,000+ gallons/year — EPA
    ENERGY STAR refrigerators use 9% less energy than standard models
    Clean refrigerator coils annually for optimal efficiency — DOE
    Air-drying dishes instead of heat-dry saves 15-50% on dishwasher energy — DOE
    Proper attic insulation can cut heating/cooling costs by 15% — ENERGY STAR
    Windows can account for 25-30% of home heating/cooling energy use — DOE
    Window film can reduce solar heat gain by up to 70% — DOE
    Average US home solar system offsets 3-4 tons of CO₂ annually — EPA
    Solar panel costs have dropped 70%+ over the past decade — SEIA
    EVs cost about 60% less to fuel than gas vehicles — DOE
    Proper tire inflation improves gas mileage by 0.6% on average — DOE
    The average US household spends $2,000+/year on energy — EIA
    ENERGY STAR products have saved Americans $500 billion on energy bills
    LED bulbs use 75% less energy than incandescent bulbs — DOE
    Turning off lights when leaving saves $30-50/year per household — ENERGY STAR
    Standby power ('vampire load') can account for 5-10% of home energy use — DOE
    ENERGY STAR certified TVs use 25% less energy than standard models
    Programmable thermostats can save about 10% on heating/cooling — DOE
    Sealing air leaks can save 10-20% on heating and cooling costs — ENERGY STAR
    Heat pumps can reduce heating energy use by 50% vs. electric resistance — DOE
    Ceiling fans allow you to raise AC settings 4°F with no comfort loss — DOE
    Heating water accounts for about 18% of home energy use — DOE
    Low-flow showerheads save 2,700 gallons/year for a family of four — EPA
    Washing clothes in cold water can save $60+/year on water heating — ENERGY STAR
    Fixing a leaky faucet can save 3,000+ gallons/year — EPA
    ENERGY STAR refrigerators use 9% less energy than standard models
    Clean refrigerator coils annually for optimal efficiency — DOE
    Air-drying dishes instead of heat-dry saves 15-50% on dishwasher energy — DOE
    Proper attic insulation can cut heating/cooling costs by 15% — ENERGY STAR
    Windows can account for 25-30% of home heating/cooling energy use — DOE
    Window film can reduce solar heat gain by up to 70% — DOE
    Average US home solar system offsets 3-4 tons of CO₂ annually — EPA
    Solar panel costs have dropped 70%+ over the past decade — SEIA
    EVs cost about 60% less to fuel than gas vehicles — DOE
    Proper tire inflation improves gas mileage by 0.6% on average — DOE
    The average US household spends $2,000+/year on energy — EIA
    ENERGY STAR products have saved Americans $500 billion on energy bills
    EnergyBS
    BACK_TO_CATEGORY
    Water Heating & ConservationEnergyBS

    Rainwater Harvesting: When a Barrel Becomes Illegal

    In Colorado, catching rain used to be a crime. In other states, it's mandatory. Navigating the bizarre legal landscape of water rights.

    2 min read
    EnergyBS Research

    "Who Owns the Rain?"

    It sounds absurd, but in the Western US, Water Rights are serious business. The logic: The rain that falls on your roof belongs to the river basin, which belongs to the farmers/cities downstream who bought the rights in 1890. By catching it, you are "stealing" from the river.

    The Legal shift

    • Colorado: Illegal until 2016. Now, residential homes can have up to 110 gallons (2 barrels).
    • Utah: Legal, but requires registering with the state engineer.
    • California/Texas: Encouraged. Some cities offer rebates ($50 per barrel) or require cisterns for new builds.

    Barrel vs. Cistern

    • Rain Barrel (50 Gallons): Cute. Good for watering 3 flower pots. Fills up in 15 minutes of heavy rain. Mostly symbolic.
    • Cistern (1,000+ Gallons): Serious infrastructure. Can water a garden all summer. Requires a concrete pad and a pump.

    The "First Flush" Diverter

    Roof water is dirty (bird poop, pollen, shingle grit). If you don't filter it, your barrel turns into a stinking sludge factory. You need a First Flush Diverter. It is a vertical pipe that catches the first 5 gallons of rain (the dirty wash) and seals it off, letting only the clean water enter the tank.

    Safety

    NEVER DRINK ROOF WATER. (Unless you have a $2,000 UV + Sediment filtration system). Shingles leach asphalt and chemicals. Use rain water for:

    1. Lawns/Ornamentals.
    2. Washing cars.
    3. Flushing toilets (requires separate plumbing).

    Summary

    Check your state laws ("State + Rainwater Harvesting Statute"). Start with one barrel. If you use it, buy a tank. If you don't, you just bought a mosquito breeding ground.

    Related Articles

    Mar 27, 2026

    Atmospheric Water Generators: Water From Air?

    Sci-Fi 'Moisture Vaporators' are real. Solar-powered Hydropanels (Source) can create drinking water in the desert. But the cost per gallon is steep.

    Mar 28, 2026

    Blackwater Recycling: The Sewage Frontier

    San Francisco requires large buildings to treat their own sewage and reuse it for toilets. When will this 'Toilet-to-Toilet' tech hit the residential market?

    Mar 14, 2026

    Salt-Free Water Softeners: Snake Oil or Science?

    Everyone hates hauling 40lb bags of salt. 'Salt-Free Conditioners' claim to prevent scale without the salt. Do they work? Yes and No.