Community Water System · PWS IA3409066
Colwell, City Of
Operator location Alta Vista, Iowa - 0% of 69 violations are health-based (lower-third health share (≤ 1%)); groundwater source; 55 served per SDWIS.
- 55
- People served (this PWS)
- 69
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Colwell, City Of standing, mid SDWIS violation third
0% of 69 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%).
The verdict
Colwell, City Of lands in the middle third by violation volume (69), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (55; smaller served population (≤ 999)), so each violation row represents a compact service footprint. 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.
- 69
- Total EPA violations on record
- 0%
- Health-based (MCL / treatment failure)
- 55
- 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
- 38
- County
- Floyd
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 47
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 11 | 1997 |
| Nitrate | MR | 9 | 1994 |
| Cadmium | MR | 4 | 1985 |
| Nitrite | MR | 3 | 1997 |
| 1,2,4-Trichlorobenzene | MR | 3 | 1995 |
| LASSO | MR | 3 | 1997 |
| Antimony, Total | MR | 3 | 1992 |
| Gross Alpha, Excl. Radon and U | MR | 3 | 1992 |
| Consumer Confidence Rule | Other | 3 | 1999 |
| Lead and Copper Rule | MR | 2 | 1988 |
| Arsenic | MR | 1 | 1985 |
| Fluoride | MR | 1 | 1985 |
| Mercury | MR | 1 | 1985 |
| Barium | MR | 1 | 1985 |
| Selenium | MR | 1 | 1985 |
| Chromium | MR | 1 | 1985 |
Violation Count vs. the National Corpus
Colwell, City Of has 69 recorded EPA violations, 65% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 35% carry more. 0% of this system's own violations are health-based (0 of 69), 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)
69 Around the middle fewer violations than 35% 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 Colwell, City Of
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 IA3409066.
Sources: EPA SDWIS
Nationwide peers
69 violations · 55 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.
What to do with Colwell, City Of
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.