Community Water System · PWS IA5200817
Coralville Lake Terrace
Operator location Tipton, Iowa - 31% of 362 violations are health-based (upper-third health share (> 23%)); groundwater source; 340 served per SDWIS.
- 340
- People served (this PWS)
- 362
- EPA violations (this PWS)
- 113
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Coralville Lake Terrace standing, high SDWIS violation third
31% of 362 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 31% is upper-third health share (> 23%).
The verdict
Coralville Lake Terrace sits in the upper third of the sitemap cohort by violation count (362), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (340; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 31% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 362
- Total EPA violations on record
- 31%
- Health-based (MCL / treatment failure)
- 340
- 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
- Private
- Connections
- 85
- County
- Johnson
- School/Daycare
- No
- MCL Violations
- 113
- Monitoring Violations
- 164
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 113 | 2002 |
| Coliform (TCR) | MR | 61 | 2010 |
| Nitrate | MR | 40 | 2014 |
| Consumer Confidence Rule | Other | 37 | 2016 |
| Lead and Copper Rule | MR | 23 | 2010 |
| Total Haloacetic Acids (HAA5) | MR | 10 | 2015 |
| Gross Alpha, Excl. Radon and U | MR | 9 | 1994 |
| TTHM | MR | 7 | 2015 |
| Arsenic | MR | 7 | 2001 |
| Public Notice | Other | 4 | 2014 |
| Mercury | MR | 1 | 1980 |
| Selenium | MR | 1 | 1980 |
| Combined Radium (-226 and -228) | MR | 1 | 1980 |
| Cadmium | MR | 1 | 1980 |
| Barium | MR | 1 | 1980 |
| Chromium | MR | 1 | 1980 |
| Fluoride | MR | 1 | 1980 |
Violation Count vs. the National Corpus
Coralville Lake Terrace has 362 recorded EPA violations, 93% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 7% carry more. 31% of this system's own violations are health-based (113 of 362), 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)
362 Higher than most more violations than 93% 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 Coralville Lake Terrace
113 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for IA5200817.
Sources: EPA SDWIS
Nationwide peers
362 violations · 340 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.
What to do with Coralville Lake Terrace
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.