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La Crosse Waterworks

Published drinking-water records and contacts for La Crosse Waterworks. System WI6320309. Review sources and dates; not a real-time water assessment.

System ID
WI6320309
State or territory
WI
Published population served
53000
System type (source code)
CWS

Published records and dates

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
SubstancePublished resultReporting limitSample dateSampling location
11Cl-PF3OUdS< 0.005 µg/L0.005 µg/L2024-05-06Well 15 / 15
4:2 FTS< 0.003 µg/L0.003 µg/L2024-05-06Well 15 / 15
6:2 FTS< 0.005 µg/L0.005 µg/L2024-05-06Well 15 / 15
8:2 FTS< 0.005 µg/L0.005 µg/L2024-05-06Well 15 / 15
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2024-05-06Well 15 / 15
ADONA< 0.003 µg/L0.003 µg/L2024-05-06Well 15 / 15
HFPO-DA< 0.005 µg/L0.005 µg/L2024-05-06Well 15 / 15
NEtFOSAA< 0.005 µg/L0.005 µg/L2024-05-06Well 15 / 15
NFDHA< 0.02 µg/L0.02 µg/L2024-05-06Well 15 / 15
NMeFOSAA< 0.006 µg/L0.006 µg/L2024-05-06Well 15 / 15
PFBA< 0.005 µg/L0.005 µg/L2024-05-06Well 15 / 15
PFBS< 0.003 µg/L0.003 µg/L2024-05-06Well 15 / 15
PFDA< 0.003 µg/L0.003 µg/L2024-05-06Well 15 / 15
PFDoA< 0.003 µg/L0.003 µg/L2024-05-06Well 15 / 15
PFEESA< 0.003 µg/L0.003 µg/L2024-05-06Well 15 / 15
PFHpA< 0.003 µg/L0.003 µg/L2024-05-06Well 15 / 15
PFHpS< 0.003 µg/L0.003 µg/L2024-05-06Well 15 / 15
PFHxA< 0.003 µg/L0.003 µg/L2024-05-06Well 15 / 15
PFHxS< 0.003 µg/L0.003 µg/L2024-05-06Well 15 / 15
PFMBA< 0.003 µg/L0.003 µg/L2024-05-06Well 15 / 15
PFMPA< 0.004 µg/L0.004 µg/L2024-05-06Well 15 / 15
PFNA< 0.004 µg/L0.004 µg/L2024-05-06Well 15 / 15
PFOA< 0.004 µg/L0.004 µg/L2024-05-06Well 15 / 15
PFOS< 0.004 µg/L0.004 µg/L2024-05-06Well 15 / 15
PFPeA< 0.003 µg/L0.003 µg/L2024-05-06Well 15 / 15
PFPeS< 0.004 µg/L0.004 µg/L2024-05-06Well 15 / 15
PFTA< 0.008 µg/L0.008 µg/L2024-05-06Well 15 / 15
PFTrDA< 0.007 µg/L0.007 µg/L2024-05-06Well 15 / 15
PFUnA< 0.002 µg/L0.002 µg/L2024-05-06Well 15 / 15
lithium< 9 µg/L9 µg/L2024-05-06Well 15 / 15

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
SubstancePublished 90th percentileMonitoring periodSource quarter
Lead (PB90) 0.00134 mg/L2026-01-01 – 2026-06-302026Q3
Lead (PB90) 0.0109 mg/L2025-06-01 – 2025-09-302026Q3
Lead (PB90) 0 mg/L2023-01-01 – 2023-06-302026Q3
Lead (PB90) 0 mg/L2022-07-01 – 2022-12-312026Q3
Lead (PB90) 0.00179 mg/L2020-07-01 – 2020-10-312026Q3
Lead (PB90) 0.00227 mg/L2017-06-01 – 2017-09-302026Q3
Lead (PB90) 0.00293 mg/L2014-06-01 – 2014-09-302026Q3
Lead (PB90) 0.003 mg/L2011-06-01 – 2011-09-302026Q3

Published compliance history

16 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 / recordPeriodRecorded statusHealth-based (EPA classification)Source quarter
Lead and Copper Rule / Lead Consumer Notice2023-04-01 – —ResolvedNo2026Q3
Lead and Copper Rule / Lead Consumer Notice2021-02-01 – —ResolvedNo2026Q3
Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation2019-10-01 – —ResolvedNo2026Q3
Nitrate Rule / Monitoring, Regular2019-01-01 – 2019-12-31ResolvedNo2026Q3
Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation2017-10-01 – —ResolvedNo2026Q3
Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation2017-10-01 – —ResolvedNo2026Q3
Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation2017-10-01 – —ResolvedNo2026Q3
Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation2017-10-01 – —ResolvedNo2026Q3
Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation2017-10-01 – —ResolvedNo2026Q3
Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation2017-10-01 – —ResolvedNo2026Q3
Lead and Copper Rule / Water Quality Parameter M/R2017-06-01 – 2020-05-31ResolvedNo2026Q3
Lead and Copper Rule / Water Quality Parameter M/R2017-06-01 – 2020-05-31ResolvedNo2026Q3
Lead and Copper Rule / Water Quality Parameter M/R2017-06-01 – 2020-05-31ResolvedNo2026Q3
Lead and Copper Rule / Water Quality Parameter M/R2017-06-01 – 2020-05-31ResolvedNo2026Q3
Lead and Copper Rule / Water Quality Parameter M/R2017-06-01 – 2020-05-31ResolvedNo2026Q3
Lead and Copper Rule / Water Quality Parameter M/R2017-06-01 – 2020-05-31ResolvedNo2026Q3

Source dates and refresh checks

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

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