Tap and WellTreasure Valley water, from the public record

Cyanide in Treasure Valley drinking water

1 of 5 systems that tested for it in the last 36 months detected it. Cyanide is an inorganic contaminant. Certified filters are in the list.

SystemCounty36 mo maxLatestStatusLast sample
Veolia Water IdahoAda0.01ppmNDDetected2026-08-25

Limits

Federal limit (MCL)
0.2 mg/L (0.20ppm)
Health goal (MCLG)
0.20ppm
Some people who drink water containing cyanide well in excess of the MCL over many years could experience nerve damage or problems with their thyroid.EPA, quoted.

Removal methods in the reference list: reverse osmosis, ion exchange, chlorination. A method name is not a product certification.

By city: Cyanide in Boise City drinking water, Cyanide in Garden City drinking water, Cyanide in Meridian drinking water.

Not enough groundwater samples in the region to estimate Cyanide in private wells. A lab test is the only way to know.

Numbers are the system's samples at its taps and wells, not yours. Lead and copper are 90th percentiles from sampled homes. Well pages are nearby-sample estimates. Health text restates EPA and DEQ. Methodology.