Community Water System · PWS IA8482701
Rock Valley Rural Water District
Operator location Rock Valley, Iowa - 14% of 64 violations are health-based (middle-third health share (≤ 23%)); groundwater source; 2,230 served per SDWIS.
- 2,230
- People served (this PWS)
- 64
- EPA violations (this PWS)
- 9
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Rock Valley Rural Water District standing, mid SDWIS violation third
14% of 64 recorded violations are health-based - middle-third health share (≤ 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 14% is middle-third health share (≤ 23%). Population rank #12,753 of 29,740 among systems serving 500+.
The verdict
Rock Valley Rural Water District lands in the middle third by violation volume (64), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 2,230 (mid served population (≤ 3,309)). Health-based share is 14% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #12,753 of 29,740
- Population · /systems
- #187 of 545
- Population · IA
- 64
- Total EPA violations on record
- 14%
- 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
- Private
- Connections
- 892
- County
- Sioux
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 45
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Ethylbenzene | MR | 15 | 1996 |
| Xylenes, Total | MR | 15 | 1996 |
| Coliform (TCR) | MCL | 6 | 1993 |
| Nitrate | MR | 5 | 1987 |
| Coliform (TCR) | MR | 4 | 2003 |
| Groundwater Rule | TT | 3 | 2016 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2005 |
| TTHM | MR | 3 | 2005 |
Violation Count vs. the National Corpus
Rock Valley Rural Water District has 64 recorded EPA violations, 63% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 37% carry more. 14% of this system's own violations are health-based (9 of 64), and it ranks #12,753 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)
64 Around the middle fewer violations than 37% 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 Rock Valley Rural Water District
9 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for IA8482701.
Sources: EPA SDWIS
Nationwide peers
64 violations · 2,230 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 Rock Valley Rural Water District
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.