PlainWater
States → Iowa

Community Water System · PWS IA1778008

Swaledale Water Supply

Marshalltown, Iowa 50158 - drinking water served from groundwater sources to 144 people, tracked in EPA SDWIS and UCMR5.

144
People served
129
EPA violations
22
Health-based
Untested
UCMR5 result

The verdict

EPA records 129 drinking-water violations at Swaledale Water Supply, 17% of them health-based - above the Iowa per-system average.

129
Total EPA violations on record
17%
Health-based (MCL / treatment failure)
144
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Swaledale Water Supply

Swaledale Water Supply is a local-owned community water system that delivers drinking water to 144 residents in Marshalltown, Iowa (Cerro Gordo County) through 93 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 129 total violations for this system , of which 22 (17%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 71 monitoring and reporting violations are on file. The most recent violation on record dates to 2001.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 22 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Iowa, EPA tracks 1,795 public water systems serving 3,114,444 people, with 138,271 cumulative violations and 27,946 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 77 violations. Statewide, 127 of 152 UCMR5-tested systems have reported PFAS detections (83.6%).

Swaledale Water Supply's 129 violations sit above the Iowa average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
144
Total Violations
129
Health-Based Violations
22
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
93
County
Cerro Gordo
School/Daycare
No
MCL Violations
22
Monitoring Violations
71
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 22 1992
Coliform (TCR) MR 20 1992
Arsenic MR 8 2001
LASSO MR 3 1995
Atrazine MR 3 1995
Benzo(a)pyrene MR 3 1995
Di(2-ethylhexyl) adipate MR 3 1995
Di(2-ethylhexyl) phthalate MR 3 1995
Dinoseb MR 3 1995
Simazine MR 3 1995
2,4,5-TP MR 3 1995
Dalapon MR 3 1995
Pentachlorophenol MR 3 1995
2,4-D MR 3 1995
Picloram MR 3 1995
Barium MR 1 1980
Selenium MR 1 1980
Fluoride MR 1 1980
Chromium MR 1 1980
Cadmium MR 1 1980
Nitrate MR 1 1980
Mercury MR 1 1980

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Swaledale Water Supply.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID IA1778008 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Iowa Drinking Water Authority

Iowa's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find IA regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2001 Arsenic MR 8 SDWIS / IA1778008 / 1005
1995 LASSO MR 3 SDWIS / IA1778008 / 2051
1995 Atrazine MR 3 SDWIS / IA1778008 / 2050
1995 Benzo(a)pyrene MR 3 SDWIS / IA1778008 / 2306
1995 Di(2-ethylhexyl) adipate MR 3 SDWIS / IA1778008 / 2035
1995 Di(2-ethylhexyl) phthalate MR 3 SDWIS / IA1778008 / 2039
1995 Dinoseb MR 3 SDWIS / IA1778008 / 2041
1995 Simazine MR 3 SDWIS / IA1778008 / 2037
1995 2,4,5-TP MR 3 SDWIS / IA1778008 / 2110
1995 Dalapon MR 3 SDWIS / IA1778008 / 2031
1995 Pentachlorophenol MR 3 SDWIS / IA1778008 / 2326
1995 2,4-D MR 3 SDWIS / IA1778008 / 2105
1995 Picloram MR 3 SDWIS / IA1778008 / 2040
1992 Coliform (TCR) MCL 22 SDWIS / IA1778008 / 3100
1992 Coliform (TCR) MR 20 SDWIS / IA1778008 / 3100

How Swaledale Water Supply Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Swaledale Water Supply Iowa avg Federal benchmark
Total violations 129 77 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 22 15.6 Indicates a contaminant exceeded a federal MCL
PFAS detection None 83.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 144 1,735 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,795 regulated public water systems in Iowa.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Swaledale Water Supply water safe to drink? ▼
Swaledale Water Supply (PWS ID: IA1778008) has 129 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 144 people using Groundwater sources.
How many people does Swaledale Water Supply serve? ▼
Swaledale Water Supply serves 144 people in Marshalltown, Iowa. It is a Local-owned system using Groundwater water sources with 93 service connections.
What type of violations does Swaledale Water Supply have? ▼
Swaledale Water Supply has 129 total violations: 22 health-based violations (MCL exceedances or treatment failures), 71 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Swaledale Water Supply water? ▼
No PFAS testing data is available for Swaledale Water Supply under the EPA's UCMR5 monitoring program.
What water source does Swaledale Water Supply use? ▼
Swaledale Water Supply uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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 system's figures are rendered directly from 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.