Southern Sioux County Rural Water

Published drinking-water records and contacts for Southern Sioux County Rural Water. System IA8400733. Review sources and dates; not a real-time water assessment.

System ID: IA8400733
State or territory: IA
Published population served: 5420
System type (source code): CWS

Published records and dates

PFAS / lithium (EPA UCMR 5): 60 — 2023-01-09 – 2023-07-10
Lead and copper monitoring summaries: 14 — 1993-07-01 – 2026-12-31

Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.

Published testing results

Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.

“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example

EPA UCMR 5 — most recent imported sample per substance
Substance	Published result	Reporting limit	Sample date	Sampling location
11Cl-PF3OUdS	< 0.005 µg/L	0.005 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
4:2 FTS	< 0.003 µg/L	0.003 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
6:2 FTS	< 0.005 µg/L	0.005 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
8:2 FTS	< 0.005 µg/L	0.005 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
9Cl-PF3ONS	< 0.002 µg/L	0.002 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
ADONA	< 0.003 µg/L	0.003 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
HFPO-DA	< 0.005 µg/L	0.005 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
NEtFOSAA	< 0.005 µg/L	0.005 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
NFDHA	< 0.02 µg/L	0.02 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
NMeFOSAA	< 0.006 µg/L	0.006 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFBA	< 0.005 µg/L	0.005 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFBS	< 0.003 µg/L	0.003 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFDA	< 0.003 µg/L	0.003 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFDoA	< 0.003 µg/L	0.003 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFEESA	< 0.003 µg/L	0.003 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFHpA	< 0.003 µg/L	0.003 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFHpS	< 0.003 µg/L	0.003 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFHxA	< 0.003 µg/L	0.003 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFHxS	< 0.003 µg/L	0.003 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFMBA	< 0.003 µg/L	0.003 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFMPA	< 0.004 µg/L	0.004 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFNA	< 0.004 µg/L	0.004 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFOA	< 0.004 µg/L	0.004 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFOS	< 0.004 µg/L	0.004 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFPeA	< 0.003 µg/L	0.003 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFPeS	< 0.004 µg/L	0.004 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFTA	< 0.008 µg/L	0.008 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFTrDA	< 0.007 µg/L	0.007 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
PFUnA	< 0.002 µg/L	0.002 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01
lithium	26 µg/L	9 µg/L	2023-07-10	SOUTHERN SIOUX COUNTY RURAL WATER / 01

Download all EPA UCMR 5 records (CSV)

Lead and copper: 90th-percentile summaries

These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile

Eight most recent imported monitoring summaries
Substance	Published 90th percentile	Monitoring period	Source quarter
Lead (PB90)	0.0021 mg/L	2024-01-01 – 2026-12-31	2026Q3
Lead (PB90)	0.0024 mg/L	2021-01-01 – 2023-12-31	2026Q3
Lead (PB90)	0.0063 mg/L	2018-01-01 – 2020-12-31	2026Q3
Lead (PB90)	0.0045 mg/L	2015-01-01 – 2017-12-31	2026Q3
Lead (PB90)	0.005 mg/L	2012-01-01 – 2014-12-31	2026Q3
Lead (PB90)	0.006 mg/L	2009-01-01 – 2011-12-31	2026Q3
Lead (PB90)	0.004 mg/L	2006-01-01 – 2008-12-31	2026Q3
Lead (PB90)	0.004 mg/L	2003-01-01 – 2005-12-31	2026Q3

Published compliance history

8 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.

Twenty most recent imported compliance records
Rule / record	Period	Recorded status	Health-based (EPA classification)	Source quarter
Arsenic Rule / Monitoring, Regular	1981-01-01 – 1982-12-31	Archived	No	2026Q3
Inorganic Chemicals / Monitoring, Regular	1981-01-01 – 1982-12-31	Archived	No	2026Q3
Inorganic Chemicals / Monitoring, Regular	1981-01-01 – 1982-12-31	Archived	No	2026Q3
Inorganic Chemicals / Monitoring, Regular	1981-01-01 – 1982-12-31	Archived	No	2026Q3
Inorganic Chemicals / Monitoring, Regular	1981-01-01 – 1982-12-31	Archived	No	2026Q3
Inorganic Chemicals / Monitoring, Regular	1981-01-01 – 1982-12-31	Archived	No	2026Q3
Nitrate Rule / Monitoring, Regular	1981-01-01 – 1982-12-31	Archived	No	2026Q3
Inorganic Chemicals / Monitoring, Regular	1981-01-01 – 1982-12-31	Archived	No	2026Q3

Source dates and refresh checks

A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.

EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17

Administrative contact (EPA filing)

Southern Sioux County Rural Water: 712-278-2212

An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.

Official state resources · How to read these records