Pewaukee, Wisconsin Water Quality Report
Water quality data for 10 water systems serving 17,799 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| 6:2 FTS | 0.035 | No federal limit | — | — | No federal limit |
| lithium | 11.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 110% | Above guideline |
| PFBA | 0.013 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFBS | 0.027 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHpA | 0.008 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxA | 0.040 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.069 | 0.010 ug/L | 0.001 ug/L(EWG) | 690% | Above limit |
| PFOA | 0.009 | 0.004 ug/L | 0.090 ug/L(EWG) | 213% | Above limit |
| PFOS | 0.012 | 0.004 ug/L | 0.300 ug/L(EWG) | 300% | Above limit |
| PFPeA | 0.024 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFPeS | 0.021 | No federal limit | — | — | No federal limit |
Recommended Water Filters
Based on the contaminants detected in your water supply, these filtration systems are recommended:
Reverse Osmosis (RO)
Reverse osmosis systems remove up to 99% of PFAS compounds. Recommended for homes with detected PFAS.
Up to 99% PFAS removal
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Compliance & Violations
Active Violations (17)
75
Aug 18, 2025
75
Aug 18, 2025
75
Mar 3, 2025
75
Mar 3, 2025
75
Feb 12, 2025
75
Feb 12, 2025
75
Nov 18, 2024
75
Oct 17, 2024
75
Oct 17, 2024
75
Oct 17, 2024
75
Oct 17, 2024
75
Sep 9, 2024
75
Sep 9, 2024
75
Jul 16, 2024
75
Mar 19, 2024
75
May 24, 2023
75
May 2, 2023
Resolved Violations (483)
02
Oct 1, 2025 — Dec 15, 2025
02
Jul 1, 2025 — Sep 30, 2025
02
Jul 1, 2025 — Sep 30, 2025
02
Jul 1, 2025 — Sep 30, 2025
02
Jul 1, 2025 — Sep 30, 2025
+ 478 more resolved violations
Frequently Asked Questions
Is Pewaukee tap water safe to drink?
Pewaukee's water has 3 contaminants detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in Pewaukee tap water?
11 contaminants have been detected in Pewaukee's water supply across 10 water systems. See the full contaminant table above for details.
How can I improve my water quality in Pewaukee?
Install a water filter rated for the specific contaminants found in Pewaukee's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Pewaukee have any water quality violations?
Yes, Pewaukee currently has 35 active violations. See the violations section above for details.