Shawano Lk San Dist 1

Published drinking-water records and contacts for Shawano Lk San Dist 1. System WI4590457. Review sources and dates; not a real-time water assessment.

System ID: WI4590457
State or territory: WI
Published population served: 4950
System type (source code): CWS

Published records and dates

PFAS / lithium (EPA UCMR 5): 180 — 2023-05-16 – 2023-11-20
Lead and copper monitoring summaries: 15 — 1992-07-01 – 2023-09-30
Wisconsin DNR public-system PFAS records: 54 — 2023-05-16 – 2023-05-16

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	2023-11-20	Shawano Lake Sanitary Dist / 3
4:2 FTS	< 0.003 µg/L	0.003 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 3
6:2 FTS	< 0.005 µg/L	0.005 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 2
8:2 FTS	< 0.005 µg/L	0.005 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 1
9Cl-PF3ONS	< 0.002 µg/L	0.002 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 2
ADONA	< 0.003 µg/L	0.003 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 1
HFPO-DA	< 0.005 µg/L	0.005 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 3
NEtFOSAA	< 0.005 µg/L	0.005 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 1
NFDHA	< 0.02 µg/L	0.02 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 3
NMeFOSAA	< 0.006 µg/L	0.006 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 2
PFBA	0.0059 µg/L	0.005 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 3
PFBS	< 0.003 µg/L	0.003 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 2
PFDA	< 0.003 µg/L	0.003 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 2
PFDoA	< 0.003 µg/L	0.003 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 2
PFEESA	< 0.003 µg/L	0.003 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 3
PFHpA	< 0.003 µg/L	0.003 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 2
PFHpS	< 0.003 µg/L	0.003 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 3
PFHxA	< 0.003 µg/L	0.003 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 3
PFHxS	< 0.003 µg/L	0.003 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 2
PFMBA	< 0.003 µg/L	0.003 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 2
PFMPA	< 0.004 µg/L	0.004 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 2
PFNA	< 0.004 µg/L	0.004 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 3
PFOA	< 0.004 µg/L	0.004 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 1
PFOS	< 0.004 µg/L	0.004 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 3
PFPeA	< 0.003 µg/L	0.003 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 2
PFPeS	< 0.004 µg/L	0.004 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 3
PFTA	< 0.008 µg/L	0.008 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 1
PFTrDA	< 0.007 µg/L	0.007 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 1
PFUnA	< 0.002 µg/L	0.002 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 2
lithium	< 9 µg/L	9 µg/L	2023-11-20	Shawano Lake Sanitary Dist / 1

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)	0.00048 mg/L	2023-06-01 – 2023-09-30	2026Q3
Lead (PB90)	0.0017 mg/L	2020-07-01 – 2020-10-31	2026Q3
Lead (PB90)	0.0026 mg/L	2017-06-01 – 2017-09-30	2026Q3
Lead (PB90)	0.0023 mg/L	2014-06-01 – 2014-09-30	2026Q3
Lead (PB90)	0.0024 mg/L	2011-06-01 – 2011-09-30	2026Q3
Lead (PB90)	0.0054 mg/L	2008-01-01 – 2008-12-31	2026Q3
Lead (PB90)	0.003 mg/L	2005-01-01 – 2005-12-31	2026Q3
Lead (PB90)	0.0035 mg/L	2002-01-01 – 2002-12-31	2026Q3

Twelve most recent imported state laboratory records
Substance	Published result	Sample date	Location / source
PFDOA	< 0.23 ng/L	2023-05-16	Entry Point / Wisconsin DNR public-system PFAS records
PFHPA	< 0.45 ng/L	2023-05-16	Entry Point / Wisconsin DNR public-system PFAS records
PFHXA	< 0.48 ng/L	2023-05-16	Entry Point / Wisconsin DNR public-system PFAS records
PFHXS	< 0.35 ng/L	2023-05-16	Entry Point / Wisconsin DNR public-system PFAS records
PFNA	< 0.47 ng/L	2023-05-16	Entry Point / Wisconsin DNR public-system PFAS records
PFOA	Below a limit; numeric threshold unavailable ng/L	2023-05-16	Entry Point / Wisconsin DNR public-system PFAS records
PFOS	Below a limit; numeric threshold unavailable ng/L	2023-05-16	Entry Point / Wisconsin DNR public-system PFAS records
PFTA	< 0.35 ng/L	2023-05-16	Entry Point / Wisconsin DNR public-system PFAS records
PFTrDA	< 0.44 ng/L	2023-05-16	Entry Point / Wisconsin DNR public-system PFAS records
PFUNA	< 0.31 ng/L	2023-05-16	Entry Point / Wisconsin DNR public-system PFAS records
11CL-PF3OUDS	< 0.32 ng/L	2023-05-16	Entry Point / Wisconsin DNR public-system PFAS records
9CL-PF3ONS	< 0.35 ng/L	2023-05-16	Entry Point / Wisconsin DNR public-system PFAS records

State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.

Download state records with source notes (CSV)

Published compliance history

2 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
Ground Water Rule / Failure To Address Deficiency	2019-06-01 – —	Resolved	Yes	2026Q3
Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation	2011-11-01 – —	Unaddressed	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
Wisconsin DNR public-system PFAS records — last successful check: 2026-10-10

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