PlainWater
Counties → Missouri

Henry County, Missouri

Water Systems
13
Population Served
23,361
Total Violations
728
330 health-based
PFAS Detected
1
of 1 tested

Violation Analysis

100.0%
Systems with Violations
56.0
Avg Violations per System
45.3%
Health-Based Violations

Water Source Types

SW
10 systems (77%)
GW
3 systems (23%)

PFAS Contamination

1
Systems Tested
1
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

Henry Missouri water systems by violation status, EPA SDWIS records.

No violations on record (0) One or more violations (13)

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
Henry County Water Company 11,373 37 Detected
Henry County PWSD 3 2,993 25 -
Windsor PWS 2,900 91 -
Harry S Truman PWSD 2 2,700 46 -
Henry County PWSD 4 1,140 58 -
Urich PWS 505 49 -
Deepwater PWS 433 61 -
Montrose PWS 384 76 -
Calhoun PWS 324 40 -
Henry County PWSD 1 258 34 -
Hickory Hollow Resort 200 32 -
Blairstown PWS 123 130 -
Oakwood Water Assn 28 49 -

Other Counties in Missouri

St. Louis County
23 systems · 1,145,619 served · 1,825 violations
Cass County
31 systems · 625,744 served · 1,771 violations
Jackson County
23 systems · 405,266 served · 559 violations
St. Charles County
54 systems · 310,776 served · 2,706 violations
St. Louis city County
1 systems · 304,709 served · 27 violations
Greene County
82 systems · 265,439 served · 7,132 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Henry County? ▼
Henry County has 728 total drinking water violations across 13 water systems, of which 330 are health-based violations. 100.0% of systems have at least one violation.
How many people get water from Henry County systems? ▼
Water systems in Henry County serve approximately 23,361 people through 13 public water systems.
Has PFAS been detected in Henry County water? ▼
Of 1 water systems tested for PFAS in Henry County, 1 had PFAS detected (100.0% detection rate).
What types of water sources supply Henry County? ▼
Water systems in Henry County use SW (10 systems), GW (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. 45.3% of Henry 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.