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Counties → Idaho

Ada County, Idaho

Water Systems
87
Population Served
511,181
Total Violations
5,380
767 health-based
PFAS Detected
8
of 8 tested

Violation Analysis

92.0%
Systems with Violations
61.8
Avg Violations per System
14.3%
Health-Based Violations

Water Source Types

GW
47 systems (54%)
SW
3 systems (3%)

PFAS Contamination

8
Systems Tested
8
PFAS Detected
100.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Ada Idaho water systems by violation status, EPA SDWIS records.

No violations on record (5) One or more violations (45)

Violation history is cumulative — many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
VEOLIA WATER IDAHO 264,978 240 Detected
MERIDIAN WATER DEPT 147,340 64 Detected
KUNA CITY OF 32,038 554 Detected
STAR SEWER AND WATER DIST WATER SYSTEM 14,000 30 Detected
GARDEN CITY WATER AND SEWER SYSTEM 12,500 245 Detected
CAPITOL WATER CORP 9,000 113 Detected
EAGLE, CITY OF (WESTERN ZONE) 6,108 10 Detected
EAGLE, CITY OF (EASTERN ZONE) 3,702 51 Detected
IDOC SBX COMPLEX 3,309 69 —
IDOC IDAHO STATE CORRECTIONAL CENTER 2,204 62 —
DRY CREEK WATER COMPANY LLC 1,125 5 —
IDPR LUCKY PEAK SP DISCOVERY UNIT 1,000 128 —
CS BEEF PACKING 850 2 —
AMITY LOCUST GROVE LDS CHURCH 840 46 —
HILLSDALE ESTATES HOMEOWNERS ASSN 800 125 —
IDPR LUCKY PEAK SP SANDY POINT 777 26 —
DESERT VIEW ESTATES WATER CORP 650 107 —
IDAHO NATIONAL GUARD ORTC FACILITY 600 30 —
RUSTIC ACRES MOBILE HOME PARK 540 55 —
CITY OF EAGLE - VALNOVA 490 0 —
CITY OF EAGLE - AVIMOR 490 0 —
IDOC MOUNTAIN VIEW TRANSFORMATION CENTER 456 27 —
FLYING H TRAILER RANCH 430 35 —
EAGLE GLEN HOMEOWNERS ASSN INC 300 23 —
PUEBLO LINDO EAGLE 300 9 —
KUNA BLACKCAT LDS CHURCH 300 15 —
EAGLE LDS CHURCH #21 300 5 —
SOUTH MAPLE GROVE STAKE CENTER 300 34 —
WYMOSA WATER ASSN INC 280 397 —
PARADISE ESTATES WATER CORP 273 102 —
WEST MEADOWS ESTATES 270 51 —
ARROWROCK RANCH 250 107 —
NW LINEMAN COLLEGE 250 0 —
IDAHO NATIONAL GUARD - SNAKE RIVER TRAIN 250 0 —
TTB BRUMPTON 250 3 —
GREENHILLS ESTATES 3 200 173 —
KLUGHERZ WATER CORP 200 41 —
EAGLE MEADOWS MHP 195 13 —
EVANS WATER CORP 137 47 —
EAGLE MHC 135 54 —
LINDA VISTA MOBILE HOME PARK 125 57 —
KRIZVIEW PARK 120 53 —
BOISE STAGE STOP 100 188 —
CHAPARRAL WATER ASSN 100 90 —
BODACIOUS PIG BBQ 100 6 —
WILLOWBROOK ESTATES PROPERTY OWNERS 100 188 —
KUNA EAST 100 0 —
HAMPTON HOMES HOME OWNERS ASSN 95 30 —
EAGLE WEST SUBD WATER ASSN 92 16 —
TERRACE WATER CORP INC 84 7 —

Other Counties in Idaho

Canyon County
143 systems · 214,619 served · 9,692 violations
Kootenai County
195 systems · 178,648 served · 7,546 violations
Bonneville County
135 systems · 138,969 served · 4,633 violations
Bannock County
49 systems · 83,349 served · 2,778 violations
Twin Falls County
54 systems · 76,016 served · 2,851 violations
Madison County
33 systems · 50,343 served · 998 violations

Drinking Water Guides

Is Your Tap Water Safe?

How to interpret water quality reports and know when to take action.
PFAS: What You Need to Know

Health risks, EPA standards, and how to reduce PFAS exposure.
Check Your Water System

Step-by-step guide to finding and understanding your local water data.

Related Environmental Data

PlainEnviro
EPA toxic releases and pollution sources near water systems
PlainHealth
Cross-portal: mortality and health outcome data by state
PlainHazard
Natural disaster data affecting water infrastructure
PlainClimate
Climate and weather patterns impacting water supply

Frequently Asked Questions

How many water violations are in Ada County? ▼
Ada County has 5,380 total drinking water violations across 87 water systems, of which 767 are health-based violations. 92.0% of systems have at least one violation.
How many people get water from Ada County systems? ▼
Water systems in Ada County serve approximately 511,181 people through 87 public water systems.
Has PFAS been detected in Ada County water? ▼
Of 8 water systems tested for PFAS in Ada County, 8 had PFAS detected (100.0% detection rate).
What types of water sources supply Ada County? ▼
Water systems in Ada County use GW (47 systems), SW (3 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 14.3% of Ada County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Where does this water quality data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and UCMR5 PFAS monitoring program. SDWIS tracks violations for all public water systems regulated under the Safe Drinking Water Act.

Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial