Elkhorn Waterworks
Published drinking-water records and contacts for Elkhorn Waterworks. System WI2650062. Review sources and dates; not a real-time water assessment.
- System ID
- WI2650062
- State or territory
- WI
- Published population served
- 10317
- System type (source code)
- CWS
Published records and dates
- PFAS / lithium (EPA UCMR 5): 180 — 2025-01-21 – 2026-02-09
- Lead and copper monitoring summaries: 20 — 1992-07-01 – 2026-06-30
- Wisconsin DNR public-system PFAS records: 144 — 2022-09-15 – 2026-07-16
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
| Substance | Published result | Reporting limit | Sample date | Sampling location |
|---|---|---|---|---|
| 11Cl-PF3OUdS | < 0.005 µg/L | 0.005 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| 4:2 FTS | < 0.003 µg/L | 0.003 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| 6:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| 8:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| 9Cl-PF3ONS | < 0.002 µg/L | 0.002 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| ADONA | < 0.003 µg/L | 0.003 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| HFPO-DA | < 0.005 µg/L | 0.005 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| NEtFOSAA | < 0.005 µg/L | 0.005 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| NFDHA | < 0.02 µg/L | 0.02 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| NMeFOSAA | < 0.006 µg/L | 0.006 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFBA | < 0.005 µg/L | 0.005 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFBS | < 0.003 µg/L | 0.003 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFDA | < 0.003 µg/L | 0.003 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFDoA | < 0.003 µg/L | 0.003 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFEESA | < 0.003 µg/L | 0.003 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFHpA | < 0.003 µg/L | 0.003 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFHpS | < 0.003 µg/L | 0.003 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFHxA | < 0.003 µg/L | 0.003 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFHxS | < 0.003 µg/L | 0.003 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFMBA | < 0.003 µg/L | 0.003 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFMPA | < 0.004 µg/L | 0.004 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFNA | < 0.004 µg/L | 0.004 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFOA | < 0.004 µg/L | 0.004 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFOS | < 0.004 µg/L | 0.004 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFPeA | < 0.003 µg/L | 0.003 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFPeS | < 0.004 µg/L | 0.004 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFTA | < 0.008 µg/L | 0.008 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFTrDA | < 0.007 µg/L | 0.007 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| PFUnA | < 0.002 µg/L | 0.002 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
| lithium | < 9 µg/L | 9 µg/L | 2026-02-09 | Storage Reservoir (Wells 4 & 6) / 200 |
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
| Substance | Published 90th percentile | Monitoring period | Source quarter |
|---|---|---|---|
| Lead (PB90) | 0.013 mg/L | 2026-01-01 – 2026-06-30 | 2026Q3 |
| Lead (PB90) | 0.014 mg/L | 2025-07-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.014 mg/L | 2021-07-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0.014 mg/L | 2021-01-01 – 2021-06-30 | 2026Q3 |
| Lead (PB90) | 0.018 mg/L | 2020-07-01 – 2020-10-31 | 2026Q3 |
| Lead (PB90) | 0.0051 mg/L | 2017-06-01 – 2017-09-30 | 2026Q3 |
| Lead (PB90) | 0.0055 mg/L | 2014-06-01 – 2014-09-30 | 2026Q3 |
| Lead (PB90) | 0.0071 mg/L | 2011-06-01 – 2011-09-30 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| PFDOA | < 0.61 ng/L | 2026-07-16 | Entry Point / Wisconsin DNR public-system PFAS records |
| PFHPA | < 0.53 ng/L | 2026-07-16 | Entry Point / Wisconsin DNR public-system PFAS records |
| PFHXA | < 0.55 ng/L | 2026-07-16 | Entry Point / Wisconsin DNR public-system PFAS records |
| PFHXS | < 0.62 ng/L | 2026-07-16 | Entry Point / Wisconsin DNR public-system PFAS records |
| PFNA | < 0.51 ng/L | 2026-07-16 | Entry Point / Wisconsin DNR public-system PFAS records |
| PFOA | < 0.46 ng/L | 2026-07-16 | Entry Point / Wisconsin DNR public-system PFAS records |
| PFOS | < 0.47 ng/L | 2026-07-16 | Entry Point / Wisconsin DNR public-system PFAS records |
| PFTA | < 0.53 ng/L | 2026-07-16 | Entry Point / Wisconsin DNR public-system PFAS records |
| PFTrDA | < 0.53 ng/L | 2026-07-16 | Entry Point / Wisconsin DNR public-system PFAS records |
| PFUNA | < 0.51 ng/L | 2026-07-16 | Entry Point / Wisconsin DNR public-system PFAS records |
| 11CL-PF3OUDS | < 0.3 ng/L | 2026-07-16 | Entry Point / Wisconsin DNR public-system PFAS records |
| 9CL-PF3ONS | < 0.46 ng/L | 2026-07-16 | 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
11 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.
| Rule / record | Period | Recorded status | Health-based (EPA classification) | Source quarter |
|---|---|---|---|---|
| Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation | 2021-11-01 – — | Resolved | No | 2026Q3 |
| Ground Water Rule / Monitoring, Source Water (GWR) | 2021-10-28 – — | Resolved | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2021-01-01 – 2021-03-31 | Resolved | Yes | 2026Q3 |
| Lead and Copper Rule / Lead Service Line Replacement (LSLR) | 2020-11-01 – 2022-09-21 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2020-10-01 – 2020-12-31 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2019-07-01 – 2019-09-30 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2019-04-01 – 2019-06-30 | Resolved | Yes | 2026Q3 |
| Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation | 2018-11-07 – — | Resolved | No | 2026Q3 |
| Arsenic Rule / Maximum Contaminant Level Violation, Average | 2018-10-01 – 2018-12-31 | Resolved | Yes | 2026Q3 |
| Lead and Copper Rule / Public Education | 1993-01-01 – 1999-12-31 | Archived | Yes | 2026Q3 |
| Total Coliform Rule / Monitoring, Routine Minor (TCR) | 1991-02-01 – 1991-02-28 | 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
- 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.