Nampa water quality
Idaho DEQ results for the 6 public systems serving Nampa, about 174,446 people. Hardness, flags, and certified filters are on this page and each system report.
Does Nampa tap water meet federal standards?
At least one system had a result above a federal limit or an open health-based violation. See flagged contaminants below.
Is Nampa water hard?7.1 grains per gallon (gpg), hard (population weighted across 1 system reporting). A correctly sized softener usually pays for itself in appliance life and soap. Hardness is not a federal health violation. Nampa water hardness.
Is Nampa water fluoridated?At least one system serving Nampa reports fluoride at 0.6 mg/L (ppm) or more. On City of Nampa, the 36-month high was 1.34ppm. The federal limit (MCL) is 4 mg/L. Reverse osmosis certified to NSF/ANSI 58 reduces fluoride if you prefer less. Water is chlorinated for disinfection. fluoride in Nampa.
Water systems serving Nampa
| System | People | Status | Hardness | Flagged |
|---|---|---|---|---|
| City of Nampa | 100,200 | Worth watching | 7.1 gpg | Arsenic Nitrate (as N) |
| City of Caldwell | 74,000 | Worth watching | not reported | Arsenic |
| Westview Shervik Subdivision | 78 | Meets | not reported | |
| Southshore Water | 60 | Meets | not reported | |
| Valley View Water | 57 | Above limit | not reported | Arsenic Nitrate (as N) HFPO-DA (GenX) |
| Dahl Subdivision | 51 | Meets | not reported |
Contaminants flagged in Nampa
Arsenic in Nampa drinking water
- City of Nampa: 5.1ppb Elevated
- City of Caldwell: 7.5ppb Elevated
- Valley View Water: 21.3ppb Above limit
Nitrate (as N) in Nampa drinking water
- City of Nampa: 6.30ppm Elevated
- Valley View Water: 7.34ppm Elevated
HFPO-DA (GenX) in Nampa drinking water
- Valley View Water: 2.4ppt Elevated
Wells near Nampa
ZIP pages are estimates from nearby samples, not a test of your well: 83651 83686 83687
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.