PlainWater
Counties → Idaho

Canyon County, Idaho

Water Systems
143
Population Served
214,619
Total Violations
9,692
1,918 health-based
PFAS Detected
3
of 3 tested

Violation Analysis

95.1%
Systems with Violations
67.8
Avg Violations per System
19.8%
Health-Based Violations

Water Source Types

GW
50 systems (35%)

PFAS Contamination

3
Systems Tested
3
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

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

No violations on record (6) One or more violations (44)

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
Nampa City Of 100,200 262 Clean
Caldwell City Of 74,000 518 Clean
Middleton City Of 13,190 81 Clean
Parma City Of 2,250 13 -
Wilder City Of 1,690 31 -
Caldwell Housing Authority 1,100 86 -
Greenleaf City Of 846 52 -
Farmway Lds Church 784 5 -
Lds Building 30 Hwy 30 775 35 -
Deer Flat Lds Church 718 2 -
Sorrento Lactalis 700 46 -
Nampa Northside Lds Church 684 0 -
Lds Lansing Lane 614 5 -
Melba City Of 576 101 -
Notus City Of 539 109 -
Sunnyridge Lds Church 539 9 -
Jackson Food Store 178 500 9 -
West Canyon Elementary School 467 41 -
Simplot Potato 450 112 -
Purple Sage Elementary 410 4 -
Shalimar Subd 370 18 -
Belle Aire Acres 2 350 61 -
Lansing Meadows 320 10 -
Flamingo West 320 0 -
Chase Crossing 306 0 -
El Rancho Heights 300 193 -
Lakeys Cafe and Trailer Park 300 85 -
Parma Motor Vu 300 35 -
Evergreen Mobile Park 284 72 -
United Reformed Church of Nampa 260 15 -
Covert Water Users Association 250 133 -
Rolling Hills Estates Water Company 250 122 -
Woodview Acres Property Owners 245 63 -
Sunnyridge 3 Water Corp 240 10 -
Sunlight Terrace 234 87 -
Indian Village 225 175 -
Cti Food Service 216 35 -
Karcher Ranchette Water Corp 213 68 -
Faith Journey Church 205 0 -
Somerset West Water Corp 203 65 -
Shortstop Inc 200 58 -
Owyhee Village Subd Water Assn Inc 200 26 -
Purple Sage Golf Course 200 46 -
Extra Mile #196 200 3 -
Church of God of Prophecy 200 0 -
Woodgrain Millwork 200 0 -
Caldwell Christian Church 175 36 -
Timberstone HOA 170 5 -
Lakeview Hills Water Users Association 160 115 -
Camelot Water Assn Inc 157 20 -

Other Counties in Idaho

Ada County
87 systems · 511,181 served · 5,380 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

Frequently Asked Questions

How many water violations are in Canyon County? ▼
Canyon County has 9,692 total drinking water violations across 143 water systems, of which 1,918 are health-based violations. 95.1% of systems have at least one violation.
How many people get water from Canyon County systems? ▼
Water systems in Canyon County serve approximately 214,619 people through 143 public water systems.
Has PFAS been detected in Canyon County water? ▼
Of 3 water systems tested for PFAS in Canyon County, 3 had PFAS detected (100.0% detection rate).
What types of water sources supply Canyon County? ▼
Water systems in Canyon County use GW (50 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. 19.8% of Canyon County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
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.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.