Water Quality in Lewiston, ID
Lewiston's water has 3 contaminants above health guidelines. Consider using a certified water filter for additional protection.
Utility
LEWISTON WATER SYSTEM
People Served
20,000
MCL Violations
0
Last Updated
Jul 15, 2025
Quick Summary
Contaminants Detected
⚠️ Contaminants Above Health Guidelines (3)
Total THMs
What is Total THMs?
Group of contaminants that form in drinking water systems when a disinfectant, typically chlorine, reacts with organic matter
Health Effects
Drinking water standards for total THMs are based on evidence of carcinogenicity in human and animal studies, as well as liver and kidney toxicity observed in animal studies. Individual THMs have been further associated with developmental, immune, spleen, and genotoxicity.
Affected Organs
Common Sources
Fluoride
What is Fluoride?
Naturally occurring mineral in the environment and an essential element of tooth enamel
Health Effects
Elevated levels of fluoride in drinking water can lead to dental fluorosis in children, which is the discoloration and molting away of tooth enamel. Evidence on low-dose, chronic exposure to fluoride is not definitive but has been indicated as having potential neurological impacts. Studies have clearly established that long-term exposure to high doses of fluoride, higher than typically found in US drinking water, can have adverse effects on skeletal tissue (bones and teeth), which may cause higher risk of bone fractures in seniors. Skeletal fluorosis is a debilitating condition caused by high fluoride exposure during bone development in children.
Affected Organs
Common Sources
Radium 226
What is Radium 226?
Radium-226 is a radioactive isotope of radium, which is a naturally occurring element found in uranium ores. It is a decay product of uranium-238 and is known for its radioactive properties, emitting alpha particles and gamma radiation.
Health Effects
Exposure to Radium-226 can lead to serious health issues, including an increased risk of bone cancer and other malignancies. It can accumulate in bones and tissues, leading to long-term health effects due to its radioactivity.
Affected Organs
Common Sources
Understanding the Data
This data comes from your local water utility testing. The bar charts compare detected levels against health guidelines (HGL). Contaminants above the health guideline are shown by default and may require filtration. All other tested contaminants are within safe levels and can be viewed by expanding the section above.
Recommended Water Filters for Lewiston
Based on Lewiston's water quality data, these NSF-certified filters are recommended to remove contaminants above health guidelines.
GHP Group Inc.
VRO-3Q VRO-3Q
NSF Certified:
Daily Production
20.3 gpd
Removes 15 contaminants:
Arsenic, Barium, Cadmium, Chromium (Total), Chromium (VI) +10 more
GHP Group Inc.
PUN3RO PUN3RO
NSF Certified:
Daily Production
23.3 gpd
Removes 15 contaminants:
Arsenic, Barium, Cadmium, Chromium (Total), Chromium (VI) +10 more
![CMTRO-75[G] CMTRO-75[G]](/_next/image?url=https%3A%2F%2Fm.media-amazon.com%2Fimages%2FI%2F61r8aJRwE8L._AC_SX522_.jpg&w=3840&q=75)
Solventum Purification Inc.
CMTRO-75[G] CMTRO-75[G]
NSF Certified:
Daily Production
23.59 gpd
Removes 15 contaminants:
Arsenic, Barium, Cadmium, Chromium (Total), Chromium (VI) +10 more
Senwater Systems, LLC.
TRO508 TRO508
NSF Certified:
Daily Production
11 gpd
Removes 17 contaminants:
Arsenic, Barium, Cadmium, Chromium (Total), Chromium (VI) +12 more
Frequently Asked Questions
Lewiston's water has 3 contaminants above health guidelines. While the water meets federal legal limits, we recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems.