Community Water System · PWS ND5200169
Cathay City Of
Operator location Cathay, North Dakota - 31% of 154 violations are health-based (upper-third health share (> 23%)); groundwater source; 43 served per SDWIS.
- 43
- People served (this PWS)
- 154
- EPA violations (this PWS)
- 48
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Cathay City Of standing, high SDWIS violation third
31% of 154 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
Cathay City Of sits in the upper third of the sitemap cohort by violation count (154), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (43; 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.
- 154
- Total EPA violations on record
- 31%
- Health-based (MCL / treatment failure)
- 43
- 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
- 28
- County
- Wells
- School/Daycare
- No
- MCL Violations
- 33
- Monitoring Violations
- 88
- Treatment Tech Violations
- 5
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 34 | 2024 |
| Coliform (TCR) | MR | 28 | 2016 |
| Coliform (TCR) | MCL | 25 | 2015 |
| Lead and Copper Rule | MR | 15 | 2025 |
| Revised Total Coliform Rule | MON | 11 | 2023 |
| Chlorine | MRDL | 10 | 2011 |
| Revised Total Coliform Rule | MCL | 8 | 2018 |
| Public Notice | Other | 7 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 4 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 4 | 2024 |
| Consumer Confidence Rule | Other | 2 | 2024 |
| Lead and Copper Rule | TT | 1 | 2025 |
Violation Count vs. the National Corpus
Cathay City Of has 154 recorded EPA violations, 81% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 18% carry more. 31% of this system's own violations are health-based (48 of 154), 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)
154 Higher than most more violations than 81% 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 Cathay City Of
48 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for ND5200169.
Sources: EPA SDWIS
Nationwide peers
154 violations · 43 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 Cathay City Of
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in North Dakota compares on the same EPA violation measures. North Dakota 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.