LA CROSSE WATERWORKS
LA CROSSE, WI
Your water system exceeds federal PFAS limits. We recommend taking action.
- Population served
- 53K
- Source type
- GW
- Compounds detected
- 29
- Above federal limits
- 2
PWSID: WI6320309 · Source: EPA UCMR 5
Every compound tested
All 29 PFAS compounds in the EPA UCMR 5 program. Detected results are shown first.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
How this grade was calculated
This system received a grade of D because PFOS exceeds the EPA Maximum Contaminant Level by 1.2×.
| Grade | Criteria |
|---|---|
| A | No PFAS detected above the Minimum Reporting Level |
| B | PFAS detected, all below 50% of the EPA MCL |
| C | Worst compound between 50% and 100% of EPA MCL |
| D | At least one compound exceeds the EPA MCL (up to 5×) |
| F | At least one compound exceeds 5× the EPA MCL |
What LA CROSSE WATERWORKS customers can do
LA CROSSE WATERWORKS's water exceeds federal PFAS limits. We recommend customers take action:
- Install a reverse osmosis (RO) or activated-carbon water filter certified to NSF/ANSI Standard 53 or 58 for PFAS reduction. RO systems remove the widest range of PFAS compounds.
- Do NOT boil your water to remove PFAS — boiling concentrates them.
- Request your most recent Consumer Confidence Report from your utility and ask when PFAS treatment will be installed.
- Contact your local elected officials and water utility board to demand a remediation timeline.
- Get independent water testing through services like Tap Score (mytapscore.com) if you want to verify your in-home levels.
- Talk to your healthcare provider about PFAS exposure — especially if you are pregnant, nursing, or have young children.
Where this data comes from
- EPA Unregulated Contaminant Monitoring Rule, 5th cycle (UCMR 5)
- Testing period: 2023–2026
- EPA MCLs finalized April 2024
- Methodology
- View raw EPA UCMR data
This data reflects EPA testing. Your water utility may have more recent results — contact them directly for the most current information.