Community Water System · PWS MO5010449
Lanagan PWS
Operator location Lanagan, Missouri - 62% of 795 violations are health-based (upper-third health share (> 23%)); groundwater source; 373 served per SDWIS.
- 373
- People served (this PWS) Smaller third of systems
- 795
- EPA violations (this PWS) Upper third of systems
- 489
- Health-based (this PWS) Upper third by health-based share
- Untested
- UCMR5 (this PWS) No UCMR5 result
Lanagan PWS standing, high SDWIS violation third
62% of 795 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 62% is upper-third health share (> 23%).
The verdict
Lanagan PWS sits in the upper third of the sitemap cohort by violation count (795), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (373; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 62% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 795
- Total EPA violations on record
- 62%
- Health-based (MCL / treatment failure)
- 373
- 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.
Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 137
- County
- McDonald
- School/Daycare
- No
- MCL Violations
- 489
- Monitoring Violations
- 284
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 274 | 2020 |
| Gross Alpha, Excl. Radon and U | MCL | 200 | 2018 |
| Coliform (TCR) | MR | 37 | 2014 |
| Revised Total Coliform Rule | MON | 32 | 2023 |
| Coliform (TCR) | MCL | 15 | 2010 |
| Gross Alpha, Excl. Radon and U | MR | 14 | 2007 |
| Combined Radium (-226 and -228) | MR | 9 | 2007 |
| Radium-226 | MR | 9 | 2018 |
| Public Notice | Other | 8 | 2019 |
| Consumer Confidence Rule | Other | 6 | 2022 |
| 1,2,4-Trichlorobenzene | MR | 5 | 2020 |
| Xylenes, Total | MR | 5 | 2020 |
| o-Dichlorobenzene | MR | 5 | 2020 |
| Vinyl chloride | MR | 5 | 2020 |
| 1,1-Dichloroethylene | MR | 5 | 2020 |
| trans-1,2-Dichloroethylene | MR | 5 | 2020 |
| 1,1,1-Trichloroethane | MR | 5 | 2020 |
| 1,2-Dichloropropane | MR | 5 | 2020 |
| Trichloroethylene | MR | 5 | 2020 |
| 1,1,2-Trichloroethane | MR | 5 | 2020 |
| Tetrachloroethylene | MR | 5 | 2020 |
| CHLOROBENZENE | MR | 5 | 2020 |
| Benzene | MR | 5 | 2020 |
| Barium | MR | 5 | 2020 |
| Cadmium | MR | 5 | 2020 |
| Chromium | MR | 5 | 2020 |
| Fluoride | MR | 5 | 2020 |
| Thallium, Total | MR | 5 | 2020 |
| Selenium | MR | 5 | 2020 |
| p-Dichlorobenzene | MR | 5 | 2020 |
Violation Count vs. the National Corpus
Lanagan PWS has 795 recorded EPA violations, 98% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 2% carry more. 62% of this system's own violations are health-based (489 of 795), 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)
795 Higher than most more violations than 98% 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
How many violations vs. how serious, among peer systems
Lanagan PWS plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.
Violation volume vs. health-based share
Health-based violations on Lanagan PWS
489 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MO5010449.
Sources: EPA SDWIS · Missouri DNR, Public Drinking Water Branch
Nationwide peers
795 violations · 373 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 Lanagan PWS
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Missouri compares on the same EPA violation measures. Missouri 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.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.