Community Water System · PWS WI1110037
Poynette Waterworks
Operator location Poynette, Wisconsin - 4% of 74 violations are health-based (middle-third health share (≤ 23%)); groundwater source; 2,520 served per SDWIS.
- 2,520
- People served (this PWS) Middle third of systems
- 74
- EPA violations (this PWS) Middle third of systems
- 3
- Health-based (this PWS) Middle third by health-based share
- Untested
- UCMR5 (this PWS) No UCMR5 result
Poynette Waterworks standing, mid SDWIS violation third
4% of 74 recorded violations are health-based - middle-third health share (≤ 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 4% is middle-third health share (≤ 23%). Population rank #11,805 of 29,740 among systems serving 500+.
The verdict
Poynette Waterworks lands in the middle third by violation volume (74), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 2,520 (mid served population (≤ 3,309)). Health-based share is 4% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #11,805 of 29,740
- Population · /systems
- #230 of 744
- Population · WI
- 74
- Total EPA violations on record
- 4%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 933
- County
- Columbia
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 53
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 17 | 2001 |
| Coliform (TCR) | MR | 8 | 2000 |
| Fluoride | MR | 5 | 2020 |
| Consumer Confidence Rule | Other | 4 | 2024 |
| Groundwater Rule | TT | 3 | 2024 |
| Public Notice | Other | 2 | 2024 |
| Lead and Copper Rule | MR | 2 | 1994 |
| cis-1,2-Dichloroethylene | MR | 1 | 1993 |
| DICHLOROMETHANE | MR | 1 | 1993 |
| p-Dichlorobenzene | MR | 1 | 1993 |
| Vinyl chloride | MR | 1 | 1993 |
| 1,1-Dichloroethylene | MR | 1 | 1993 |
| 1,1,1-Trichloroethane | MR | 1 | 1993 |
| Carbon tetrachloride | MR | 1 | 1993 |
| 1,1,2-Trichloroethane | MR | 1 | 1993 |
| Tetrachloroethylene | MR | 1 | 1993 |
| CHLOROBENZENE | MR | 1 | 1993 |
| Toluene | MR | 1 | 1993 |
| o-Dichlorobenzene | MR | 1 | 1993 |
| 1,2,4-Trichlorobenzene | MR | 1 | 1993 |
| Styrene | MR | 1 | 1993 |
| Xylenes, Total | MR | 1 | 1993 |
| trans-1,2-Dichloroethylene | MR | 1 | 1993 |
| Benzene | MR | 1 | 1993 |
| 1,2-Dichloropropane | MR | 1 | 1993 |
| Trichloroethylene | MR | 1 | 1993 |
| 1,2-Dichloroethane | MR | 1 | 1993 |
| Ethylbenzene | MR | 1 | 1993 |
Violation Count vs. the National Corpus
Poynette Waterworks has 74 recorded EPA violations, 66% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 33% carry more. 4% of this system's own violations are health-based (3 of 74), and it ranks #11,805 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)
74 Around the middle fewer violations than 33% 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
How many violations vs. how serious, among peer systems
Poynette Waterworks plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.
Violation volume vs. health-based share
Health-based violations on Poynette Waterworks
3 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for WI1110037.
Sources: EPA SDWIS · Wisconsin DNR, Drinking Water and Groundwater
Nationwide peers
74 violations · 2,520 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
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 Poynette Waterworks
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.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.