Serving Prosser, WA, With Quality Septic & Sanitation Solutions

Living or running a business in Prosser, WA, means loving the local community, but it also means dealing with unique property challenges, like septic and sewer maintenance or finding reliable portable sanitation for outdoor projects and events. If you’ve ever worried about slow drains, unexpected septic issues, or where your guests will find a restroom during your next event, you’re not alone.

At Cliff’s Septic Tank Service, we know how important it is to keep your home or business running smoothly. That’s why families and businesses in Prosser have trusted our licensed, insured team since 1948. We’re right here in Central Washington, ready to deliver dependable, friendly service for septic systems, sewer lines, excavation, and portable toilet rentals no matter how big or small your need.

Ready for reliable local service? Call us at 509-882-2195 today.

Trusted Septic, Sewer, and Portable Toilet Services Tailored for Prosser

We proudly support Prosser’s residential, commercial, and industrial communities with a complete range of sanitation and excavation services, including:

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Septic Services

  • Septic Tank Pumping and Cleaning
  • System Inspections, Installations, and Repairs
  • Leach and Drain Field Restoration
  • Cesspool and Grease Trap Maintenance
  • Septic Waste Hauling
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Sewer Services

  • Sewer Line Cleaning and De-Rooting Services
  • High-Pressure Hydro Jetting
  • Video Camera Inspections
  • Drain Cleaning and Power Snaking
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Excavation Services

  • Septic Excavation and Repairs
  • Drainage System Installation
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Portable Toilet & Sanitation Rentals

  • Portable Toilet Rental
  • Handwashing Stations
  • Restroom Trailers For Large Events

Why Routine Septic Maintenance Matters

Routine septic maintenance isn’t just a good idea; it’s the best way to avoid unexpected breakdowns, expensive repairs, and messy backups on your property. Over time, solids build up in your tank and can clog pipes or seep into your drain field, causing unpleasant odors, slow drains, and even property damage.


By scheduling regular septic pumping and inspections with Cliff’s Septic Tank Service, you’re investing in the health of your system and the value of your property. Our experienced team will create a simple maintenance schedule tailored to your needs, giving you true peace of mind in Prosser, WA.

Frequently Asked Questions for Septic & Sanitation Services

  • How often should I have my septic tank pumped in Prosser?

    Most tanks need pumping every 3–5 years, but heavy use or older systems may require more frequent service. Call our office today for a recommendation  of pumping frequency for your tank. 509-882-2195

  • Can I rent portable toilets for my event or job site in Prosser?

    Absolutely! We deliver and service portable toilets, handwashing stations, and restroom trailers throughout Prosser and nearby areas. Portable toilet rentals for agriculture, construction sites, special events, and more.

  • Are estimates free?

    Yes, we provide no-obligation, free estimates for all our services.

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Call us at 509-882-2195 to get your free estimate for septic or sanitation services.