PlainWater
Counties → Iowa

Sioux County, Iowa

Water Systems
16
Population Served
38,650
Total Violations
698
158 health-based
PFAS Detected
5
of 5 tested

Violation Analysis

93.8%
Systems with Violations
43.6
Avg Violations per System
22.6%
Health-Based Violations

Water Source Types

GW
13 systems (81%)
SW
3 systems (19%)

PFAS Contamination

5
Systems Tested
5
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

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

No violations on record (1) One or more violations (15)

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
Sioux Center Municipal Water Department 8,231 21 Clean
Orange City Municipal Water Department 6,267 25 Clean
Southern Sioux County Rural Water 5,420 37 Clean
Rock Valley Water Supply 4,059 97 Clean
Rural Water System #1 3,428 69 Clean
Hawarden Water Supply 2,700 173 -
Hull Water Supply 2,384 9 -
Rock Valley Rural Water District 2,230 64 -
Alton Municipal Water Department 1,248 62 -
Hospers Municipal Water Dept 718 29 -
Boyden Municipal Water Supply 701 24 -
Ireton Water Supply 590 20 -
Granville Water Supply 310 21 -
Maurice Municipal Water Supply 265 32 -
Matlock Water Supply 74 15 -
Lewis and Clark Regional Water System 25 0 -

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 Sioux County? ▼
Sioux County has 698 total drinking water violations across 16 water systems, of which 158 are health-based violations. 93.8% of systems have at least one violation.
How many people get water from Sioux County systems? ▼
Water systems in Sioux County serve approximately 38,650 people through 16 public water systems.
Has PFAS been detected in Sioux County water? ▼
Of 5 water systems tested for PFAS in Sioux County, 5 had PFAS detected (100.0% detection rate).
What types of water sources supply Sioux County? ▼
Water systems in Sioux County use GW (13 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. 22.6% of Sioux 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.