Community Water System · PWS WI2651536
Lake Como Sanitary Dist 1
Operator location Lake Geneva, Wisconsin - 0% of 97 violations are health-based (lower-third health share (≤ 1%)); groundwater source; 3,038 served per SDWIS.
- 3,038
- People served (this PWS)
- 97
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Lake Como Sanitary Dist 1 standing, high SDWIS violation third
0% of 97 recorded violations are health-based - lower-third health share (≤ 1%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 0% is lower-third health share (≤ 1%). Population rank #10,509 of 29,740 among systems serving 500+.
The verdict
Lake Como Sanitary Dist 1 sits in the upper third of the sitemap cohort by violation count (97), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 3,038 (mid served population (≤ 3,309)). Health-based share is only 0% - almost all of this trail is monitoring or reporting. No UCMR5 PFAS test appears for this system in this extract.
- #10,509 of 29,740
- Population · /systems
- #203 of 744
- Population · WI
- 97
- Total EPA violations on record
- 0%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,332
- County
- Walworth
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 91
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 15 | 2005 |
| Combined Radium (-226 and -228) | MR | 12 | 2008 |
| Radium-228 | MR | 12 | 2008 |
| Gross Alpha, Excl. Radon and U | MR | 12 | 2008 |
| Radium-226 | MR | 12 | 2008 |
| Combined Uranium | MR | 12 | 2008 |
| Chlorine | MR | 8 | 2007 |
| Consumer Confidence Rule | Other | 6 | 2000 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2020 |
| TTHM | MR | 4 | 2020 |
Violation Count vs. the National Corpus
Lake Como Sanitary Dist 1 has 97 recorded EPA violations, 73% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 27% carry more. 0% of this system's own violations are health-based (0 of 97), and it ranks #10,509 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
97 Around the middle fewer violations than 27% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Lake Como Sanitary Dist 1
0 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for WI2651536.
Sources: EPA SDWIS · Wisconsin DNR, Drinking Water and Groundwater
Nationwide peers
97 violations · 3,038 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Lake Como Sanitary Dist 1
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Wisconsin compares on the same EPA violation measures. Wisconsin systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.