Community Water System · PWS IA9825097
Grafton Water Supply
Operator location Grafton, Iowa - 60% of 10 violations are health-based (upper-third health share (> 23%)); groundwater source; 218 served per SDWIS.
- 218
- People served (this PWS)
- 10
- EPA violations (this PWS)
- 6
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Grafton Water Supply standing, low SDWIS violation third
60% of 10 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 60% is upper-third health share (> 23%).
The verdict
Grafton Water Supply is in the lower third by violation count (10; lower-third violation load (≤ 21 violations)). A low count does not mean the system is unmonitored - monitoring and reporting violations still appear in SDWIS. Population served is smaller (218; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 60% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 10
- Total EPA violations on record
- 60%
- Health-based (MCL / treatment failure)
- 218
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
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
- 131
- County
- Worth
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 4
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 6 | 1997 |
| Chlorine | MR | 4 | 2004 |
Violation Count vs. the National Corpus
Grafton Water Supply has 10 recorded EPA violations, 18% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 81% carry more. 60% of this system's own violations are health-based (6 of 10), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
10 Among the lowest violation counts fewer violations than 81% 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 Grafton Water Supply
6 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for IA9825097.
Sources: EPA SDWIS
Nationwide peers
10 violations · 218 served: nearest cross-state SDWIS matches.
Cross-state systems with similarly light violation ledgers
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
- Eastern Shawnee EPA Region 6 — Tribal Water Systems 10violations
- Acoma Sky City Cultural Center EPA Region 6 — Tribal Water Systems 10violations
- New Town, City Of EPA Region 8 — Tribal Water Systems 10violations
- Running Creek Casino Water System (Habematolel) EPA Region 9 — Tribal Water Systems 10violations
What to do with Grafton Water Supply
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Iowa compares on the same EPA violation measures. Iowa 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.