Non-Transient Non-Community Water System · PWS OK5005588
Frontier City
Operator location Oklahoma City, Oklahoma - upper-third violation load (> 74 violations) with 411 EPA violations; groundwater source; 1,040 served (PWS-level, not municipal population).
- 1,040
- People served (this PWS)
- 411
- EPA violations (this PWS)
- 21
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Frontier City standing, high SDWIS violation third
411 EPA SDWIS violations on record - upper-third violation load (> 74 violations). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 5% is middle-third health share (≤ 23%). Population rank #19,084 of 29,740 among systems serving 500+.
The verdict
Frontier City sits in the upper third of the sitemap cohort by violation count (411), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,040 (mid served population (≤ 3,309)). Health-based share is 5% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #19,084 of 29,740
- Population · /systems
- #383 of 558
- Population · OK
- 411
- Total EPA violations on record
- 5%
- 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
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- Oklahoma
- School/Daycare
- No
- MCL Violations
- 19
- Monitoring Violations
- 379
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 164 | 2014 |
| Nitrate-Nitrite | MR | 77 | 2024 |
| Arsenic | MR | 32 | 2017 |
| Diquat | MR | 23 | 2024 |
| Chlorine | MR | 21 | 2025 |
| Coliform (TCR) | MCL | 19 | 2014 |
| Revised Total Coliform Rule | MON | 17 | 2025 |
| Endothall | MR | 15 | 2024 |
| Nitrate | MR | 10 | 2001 |
| Lead and Copper Rule | MR | 6 | 2021 |
| E. COLI | MR | 6 | 2024 |
| TTHM | MR | 4 | 2019 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2019 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 2 | 2024 |
Violation Count vs. the National Corpus
Frontier City has 411 recorded EPA violations, 94% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 6% carry more. 5% of this system's own violations are health-based (21 of 411), and it ranks #19,084 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)
411 Higher than most more violations than 94% 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
SDWIS compliance record for Frontier City
411 violations on record for OK5005588; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS
Nationwide peers
411 violations · 1,040 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.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Frontier City
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Oklahoma compares on the same EPA violation measures. Oklahoma 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.