PlainWater
Counties → Iowa

Clay County, Iowa

Water Systems
6
Population Served
19,361
Total Violations
324
121 health-based
PFAS Detected
1
of 2 tested

Violation Analysis

100.0%
Systems with Violations
54.0
Avg Violations per System
37.3%
Health-Based Violations

Water Source Types

GW
6 systems (100%)

PFAS Contamination

2
Systems Tested
1
PFAS Detected
50.0%
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

Clay Iowa water systems by violation status, EPA SDWIS records.

No violations on record (0) One or more violations (6)

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
Spencer Municipal Water Utility 11,325 23 Clean
Iowa Lakes Regional Water 6,755 26 Clean
Everly Water Supply 575 248 -
Peterson Municipal Water Supply 322 9 -
Fostoria Municipal Water Supply 233 2 -
Dickens Water Works 151 16 -

Other Counties in Iowa

Polk County
38 systems · 552,627 served · 1,563 violations
Linn County
83 systems · 224,711 served · 8,540 violations
Scott County
77 systems · 178,285 served · 5,956 violations
Johnson County
125 systems · 167,742 served · 10,912 violations
Black Hawk County
19 systems · 161,225 served · 824 violations
Story County
21 systems · 121,108 served · 1,299 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Clay County? ▼
Clay County has 324 total drinking water violations across 6 water systems, of which 121 are health-based violations. 100.0% of systems have at least one violation.
How many people get water from Clay County systems? ▼
Water systems in Clay County serve approximately 19,361 people through 6 public water systems.
Has PFAS been detected in Clay County water? ▼
Of 2 water systems tested for PFAS in Clay County, 1 had PFAS detected (50.0% detection rate).
What types of water sources supply Clay County? ▼
Water systems in Clay County use GW (6 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. 37.3% of Clay 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.