Nampa Tap Water Quality Report
Nampa's water has 3 contaminants above EPA MCLGs. Consider using a certified water filter for additional protection.
Other systems listed for Nampa with results above guidelines: BELLE AIRE ACRES 2 (2 above guidelines), INDIAN VILLAGE (3 above guidelines), BURNIE SUBD (1 above guidelines), COVERT WATER USERS ASSOCIATION (3 above guidelines), SHALIMAR SUBD (4 above guidelines), EVERGREEN MOBILE PARK (2 above guidelines), RIVERVINE SUBDIVISION (1 above guidelines), OK WATER ASSN (2 above guidelines), CAMELOT WATER ASSN INC (2 above guidelines)
People Served
100,200
Health-based violations since 2020
0
NAMPA CITY OF. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Sep 2024 · NAMPA CITY OF
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Nampa Tap Water Safe to Drink?
We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems. Nampa's water has 3 contaminants above EPA health-based guidelines (MCLGs), while it meets federal legal limits.
NAMPA CITY OF, Nampa's water system, serves 100,200 people. 9 other systems are listed for Nampa. Each system's results are listed under its own name, never added to NAMPA CITY OF's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for NAMPA CITY OF is from Sep 2024.
In EPA's 2023–2026 UCMR 5 testing, NAMPA CITY OF measured lithium at up to 42.1 µg/L, which EPA counts as above its health reference level of 10 µg/L. That level is a screening value EPA uses to decide what to study further, not a legal limit, and this result does not change this page's water-quality summary.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in Idaho
Nampa Water Service Areas
What these numbers actually mean for Nampa, ID
We read Nampa, ID’s published record and send you a short report — which findings warrant a decision, which to ignore, and what to do about it. Including when the answer is nothing.
- 3 contaminants above EPA MCLGs and 12 contaminants with an EPA health goal detected in some samples (no level on file)
- 128 results on file
- 23 PFAS compounds on record
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Recommended Water Filters for Nampa
Based on Nampa's water quality data, these NSF-certified filters are recommended to remove contaminants above EPA MCLGs.
AquaTru
Classic
NSF Certified:
Flow Rate
0.04 gpm
Daily Production
600 gpd
Highlights:
- Best overall contaminant reduction score
- Most performance certifications
- Lifetime warranty
- NSF-42, NSF-53, NSF-58, NSF-401 certified
Removes 23 contaminants:
+18 more
Molybdenum, Barium, Chlorine, Arsenic, 83+ contaminants, Calcium, Chloride, Copper, Magnesium, Nitrate, Phosphorus, Sodium, Sulfate, Total Dissolved Solids, Zinc, Total THMs, Chloroform, Nitrate (as N)
AquaTru
Carafe
NSF Certified:
Flow Rate
0.3 gpm
Daily Production
4 gpd
Highlights:
- Verified PFAS reduction
- Glass collection vessel
- Plug-and-play installation
- NSF-53, NSF-42, NSF-58, NSF-401, NSF-372 certified
Removes 17 contaminants:
+12 more
Arsenic, 83+ contaminants, Copper, Total THMs, Chloroform, Chloride, Sulfate, Nitrate (as N), Molybdenum, Barium, Strontium, Uranium
Waterdrop
G3 P600
NSF Certified:
Flow Rate
600 gpm
Daily Production
600 gpd
Highlights:
- Space-saving design
- Good contaminant reduction
- NSF-58 certified
Removes 4 contaminants:
Waterdrop
A1
NSF Certified:
Flow Rate
0.042 gpm
Daily Production
130 gpd
Highlights:
- Built-in UV sterilization
- Easy maintenance with filter change reminders
- NSF-58 certified
- Hot and cold water dispensing
Removes 12 contaminants:
+7 more
Molybdenum, Sulfate, Strontium, Phosphorus, Chlorine, Barium, Nitrate
Verify Your Water Quality with Independent Testing
With 3 contaminants above EPA MCLGs and 12 contaminants with an EPA health goal detected in some samples (no level on file), independent laboratory testing provides a second opinion and can track changes over time.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
With 3 contaminants above health guidelines, you may want to explore water purification options. Learn how to make distilled water at home for applications like humidifiers, CPAP machines, and baby formula.
What Nampa's water readings can explain
Utility-reported data for Nampa includes iron, manganese and a chlorine-based disinfectant — the readings behind these common tap water questions. We publish a city-level hardness figure for Nampa, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near Nampa? Public-water results do not apply to private wells. See Canyon County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Nampa
Nampa's tap water has an estimated 9.9 grains per gallon (170.0 mg/L, county sampling in Canyon County) — hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for an estimated 9.9 gpg water in Nampa — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For Idaho as a whole, read water softener cost in Idaho — priced against the plumber wage published for the state.
Frequently Asked Questions About Nampa Tap Water
Nampa's water has 3 contaminants above EPA MCLGs. 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.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach NAMPA CITY OF. For a problem with your water now (discolored water, no water, low pressure, a leak), contact NAMPA CITY OF directly.
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