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Tap water quality in City of Sammamish, Washington? Is it safe to drink?

The water quality in Sammamish, Washington, is generally considered safe, adhering to the guidelines set out by federal and state authorities. The local water supply is managed by the Sammamish Plateau Water and Sewer District.

Essential Information about Sammamish's Water Quality:

  1. Source: Water in Sammamish is primarily sourced from surface water supplies, including streams and rivers, which are supplemented by certain groundwater aquifers.
  2. Testing and Standards: The Sammamish Plateau Water and Sewer District conducts regular and rigorous testing to ensure compliance with the Environmental Protection Agency (EPA) and Washington State Department of Health water quality standards.
  3. Water Hardness: The water in Sammamish is considered moderately hard. This indicates a presence of minerals such as calcium and magnesium, which could contribute to mineral deposits in household plumbing over time.
  4. Common Concerns: Residents might notice minor issues like mineral buildup or a slight taste from natural minerals, but these are not harmful. Using a simple water filter can help improve the taste and mitigate these minor concerns.

While the tap water in Sammamish is undoubtedly safe for daily consumption, those concerned with mineral hardness or taste might consider installing water purifiers or softeners as additional safety measures.

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Get Involved. Take Action

Contact Your Local Elected Official & Water Supply Company

One of the best ways for cleaner water is to talk to elected officials who have a say in water quality. Ask questions and demand actionable plans for healthier water.

Filter Out Contaminants

Check out different water filters to protect your water against the detected contaminants.


Which water purifier to get for City of Sammamish, Washington?

Types of filters

GAC & Carbon

Micro filter

Ultra filter

Nano filter

Reverse Osmosis filter

Particle size filtered

> 10 Microns

10 to 0.1 Microns

0.1 to 0.01 Microns

0.01 to 0.001 Microns

< 0.0001 Microns

Common Suspended Compounds

Sediments

Pollen

Giardia Cysts

Bacteria, Algae

Yeast Cells

Asbestos fibers

Blue Indigo Dye

Cryptosporidium

MicroPlastics

Some

PFAs -polyfluoroalkyl substances

Some

Arsenic, Lead, Cadmium, Mercury

Haloacetic acids (HAA5/HAA9)

Total trihalomethanes (TTHMs)

Viruses

Some

Colloidal Silica

Some

Common Dissolved solids

1,1-Dichloroethane

Tetrachloroethylene (perchloroethylene)

Trichloroethylene

Pesticides and Herbicides

Some

Some

Synthetic Dyes

Bromide

Some

Some

Some

Some

Bromochloromethane

Some

Some

Some

Some

Hardness

Some

Aqueous Salts

Some

Endocrine disruptors

Some

Nitrate & nitrite

Some

1,4-Dioxane

Some

Aluminum

Some

Barium

Some

Chromium (total)

Some

Fluoride

Some

Manganese

Some

Molybdenum

Some

Selenium

Some

Strontium

Some

Trichlorofluoromethane

Some

Uranium, combined (pCi/L)

Some


What do we do? How do we help?

We have developed the TDSBot, an inexpensive IOT device that monitors, in real time, the Incoming and Outgoing TDS levels, temperature, flow rate and cumulative volume of water filtered. Easy to install, it works with all water purifiers including, sediment, GAC, Carbon, Micro, Ultra, Nano and Reverse Osmosis water filters. Key benefits:

  • Know the incoming and filtered water quality in real time.
  • Know the volume of water filtered by day, week, month and total.
  • Know in advance when to change filter cartridges. Too often we tend to realize that they need changing after the water purifier has stopped working or worse, when the water smells bad.
  • Change filters only when needed. Sometimes filters perform longer than their standard life due to better incoming water or lower usage. Reduce waste and save money.
  • Quality data collected is aggregated to show real time water quality data to all the community.

TDSBot can be installed on water purifiers from Pentair, Culligan, 3M, Brita, BWT, iSpring, and most other brands. Supports sediment, GAC, Micro, Ultra, Nano and Reverse osmosis filters. It can remotely monitor filters attached to Coffee machines, Ice makers, soda fountains, water dispensers, ovens, laundry & dish washing, car wash found at Cafes, convenient stores, healthcare facilities, hotels, offices, restaurants, colleges, schools, hydroponic systems, and many more.

There are no TDSBots in City of Sammamish, Washington that are sharing tap water quality. Be the first one to install one on your water purifier. We are giving $10 off. Apply coupon code - City of Sammamish while checking out.

Ensure safe and healthy drinking water. Start sharing tape water quality in City of Sammamish for the benefit of the community


Sustainability Impact Insights

TDSBot can generate a variety of sustainability data, including water usage metrics, identify areas of reducing water waste, leak detection and prevention, extend filter and equipment lifespan, predictive maintenance alerts to extend equipment life and reduce environmental impact.
Sustainability data can be easily showcased on your corporate website or publicly shared on your social media

1 064 235

Plastic Bottles Saved

8 811 Kg

CO2 Emissions Saved

USD 234 131

Bottled H2O/Maintenance Savings

24 673

Car Miles Avoided

881

Equivalent Trees Planted

532 117 L

Total Water Filtered

last update 04/29/2025


Learn About Water Quality

* A definition specific to a few codes is that “Safe drinking water” means water that meets all primary and secondary drinking water standards. Drinking water standards are set based on potential health impacts and also take into account the cost to meet the drinking water standard. Also, the U.S. Environmental Protection Agency (EPA) defines drinking water as safe when humans can drink it with low risk of immediate or long-term harm to your health. Although there may be health risks associated with certain contaminants found in drinking water not all contaminants are necessarily harmful.
** Based on the data collected from the TDSBots installed in Los Angeles, California

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