TapGraded
A

NAMPA CITY OF

Nampa, ID · 100,200 served

NAMPA CITY OF serves 100,200 people in Nampa, ID. It has 0 health-based violations in the last 5 years. TapGraded gives this system an A.

Score breakdown

Health-based violations (5y)

0

Monitoring violations (5y)

1

Currently unaddressed

0

Overall score

98/100

Violation history (last 5 years)

2023
Health-based Monitoring / reporting

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Lead (Lead and Copper Rule)

EPA's current lead action level is 15 ppb (dropping to 10 ppb in 2027 under the Lead and Copper Rule Improvements).

90th-percentile lead sample 2 ppb
0 ppb EPA action level: 15 ppb

Latest EPA Lead and Copper Rule 90th-percentile reading (monitoring period ending December 31, 2024).

PFAS (UCMR5 occurrence data)

PFOS (not detected) 0 ppt
0 ppt EPA MCL: 4 ppt
PFOA (not detected) 0 ppt
0 ppt EPA MCL: 4 ppt
PFNA (not detected) 0 ppt
0 ppt EPA MCL: 10 ppt
PFHxS (not detected) 0 ppt
0 ppt EPA MCL: 10 ppt
HFPO-DA (not detected) 0 ppt
0 ppt EPA MCL: 10 ppt

System details

System type
Community water system
Water source
Ground water
Ownership
Local government
Service connections
38,361

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Frequently asked questions

Is Nampa, ID tap water safe to drink?

NAMPA CITY OF has 0 health-based violations in the last 5 years. TapGraded gives this system an A. A Tap Grade summarizes public EPA compliance records; it is not a determination that water is safe or unsafe to drink.

Does NAMPA CITY OF have lead in its water?

The most recent 90th-percentile lead sample is 2 ppb, versus the EPA action level of 15 ppb.

Has PFAS been detected in NAMPA CITY OF's water?

This system was tested under UCMR5 and no PFAS was detected above the reporting limit in the analytes we track.

Source: EPA SDWIS/ECHO · Data as of 2026Q2

TapGraded presents public EPA data for information only — it is not health advice and not a determination that any water is safe or unsafe to drink. For health concerns, contact your water utility or local health department.