Community Water System · PWS IA6715083
Castana Municipal Water Supply
Operator location Castana, Iowa - smaller served population (≤ 999) at 103 people served; 332 SDWIS violations on record from groundwater sources.
- 103
- People served (this PWS)
- 332
- EPA violations (this PWS)
- 46
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Castana Municipal Water Supply standing, high SDWIS violation third
103 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 14% is middle-third health share (≤ 23%).
The verdict
Castana Municipal Water Supply sits in the upper third of the sitemap cohort by violation count (332), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (103; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 14% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 332
- Total EPA violations on record
- 14%
- Health-based (MCL / treatment failure)
- 103
- 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
- 85
- County
- Monona
- School/Daycare
- No
- MCL Violations
- 46
- Monitoring Violations
- 221
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 49 | 2020 |
| Coliform (TCR) | MR | 34 | 2015 |
| Nitrate | MCL | 30 | 2007 |
| Carbon tetrachloride | MR | 29 | 1995 |
| Revised Total Coliform Rule | MON | 21 | 2020 |
| E. COLI | MR | 16 | 2020 |
| Coliform (TCR) | MCL | 16 | 2013 |
| Gross Alpha, Excl. Radon and U | MR | 8 | 1988 |
| Consumer Confidence Rule | Other | 6 | 2021 |
| Lead and Copper Rule | MR | 5 | 2017 |
| Public Notice | Other | 5 | 2018 |
| 2,4-D | MR | 4 | 2013 |
| Di(2-ethylhexyl) adipate | MR | 4 | 2013 |
| Dinoseb | MR | 4 | 2013 |
| Picloram | MR | 4 | 2013 |
| Simazine | MR | 4 | 2013 |
| Dalapon | MR | 4 | 2013 |
| Atrazine | MR | 4 | 2013 |
| Di(2-ethylhexyl) phthalate | MR | 4 | 2013 |
| TTHM | MR | 4 | 2020 |
| 2,4,5-TP | MR | 4 | 2013 |
| LASSO | MR | 4 | 2013 |
| Pentachlorophenol | MR | 4 | 2013 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2020 |
| Benzo(a)pyrene | MR | 4 | 2013 |
| Arsenic | MR | 3 | 2002 |
Violation Count vs. the National Corpus
Castana Municipal Water Supply has 332 recorded EPA violations, 92% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 8% carry more. 14% of this system's own violations are health-based (46 of 332), 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)
332 Higher than most more violations than 92% 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
Population served record for Castana Municipal Water Supply
EPA SDWIS lists 103 people served and 85 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
332 violations · 103 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 Castana Municipal 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.