Community Water System · PWS AZ0415058
Epcor - Holiday Harbor
Operator location El Mirage, Arizona - smaller served population (≤ 999) at 559 people served; 380 SDWIS violations on record from surface water sources.
- 559
- People served (this PWS) Smaller third of systems
- 380
- EPA violations (this PWS) Upper third of systems
- 19
- Health-based (this PWS) Middle third by health-based share
- Untested
- UCMR5 (this PWS) No UCMR5 result
Epcor - Holiday Harbor standing, high SDWIS violation third
559 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 5% is middle-third health share (≤ 23%). Population rank #27,269 of 29,740 among systems serving 500+.
The verdict
Epcor - Holiday Harbor sits in the upper third of the sitemap cohort by violation count (380), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (559; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 5% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #27,269 of 29,740
- Population · /systems
- #383 of 413
- Population · AZ
- 380
- 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.
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
- Private
- Connections
- 254
- County
- La Paz
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 289
- Treatment Tech Violations
- 19
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 27 | 2020 |
| Coliform (TCR) | MR | 24 | 2015 |
| Interim Enhanced Surface Water Treatment Rule | MR | 18 | 2015 |
| TTHM | MR | 17 | 2021 |
| Total Haloacetic Acids (HAA5) | MR | 16 | 2021 |
| Consumer Confidence Rule | Other | 16 | 2015 |
| Lead and Copper Rule | MR | 15 | 2023 |
| Surface Water Treatment Rule | MR | 12 | 2019 |
| Nitrate | MR | 11 | 2004 |
| Surface Water Treatment Rule | TT | 10 | 2020 |
| Interim Enhanced Surface Water Treatment Rule | TT | 9 | 2020 |
| DICHLOROMETHANE | MR | 9 | 2001 |
| Toluene | MR | 9 | 2001 |
| Ethylbenzene | MR | 9 | 2001 |
| Public Notice | Other | 8 | 2021 |
| Revised Total Coliform Rule | MON | 7 | 2019 |
| Selenium | MR | 6 | 1998 |
| Arsenic | MR | 6 | 1998 |
| Mercury | MR | 6 | 1998 |
| E. COLI | MR | 6 | 2018 |
| Barium | MR | 6 | 1998 |
| Chromium | MR | 6 | 1998 |
| Fluoride | MR | 6 | 1998 |
| Cadmium | MR | 6 | 1998 |
| Endrin | MR | 4 | 2001 |
| 2,4-D | MR | 3 | 1998 |
| 2,4,5-TP | MR | 3 | 1998 |
| BHC-GAMMA | MR | 3 | 1998 |
| Methoxychlor | MR | 3 | 1998 |
| Toxaphene | MR | 3 | 1998 |
Violation Count vs. the National Corpus
Epcor - Holiday Harbor has 380 recorded EPA violations, 93% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 7% carry more. 5% of this system's own violations are health-based (19 of 380), and it ranks #27,269 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)
380 Higher than most more violations than 93% 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
Epcor - Holiday Harbor 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
Population served record for Epcor - Holiday Harbor
EPA SDWIS lists 559 people served and 254 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · Arizona DEQ, Drinking Water Program
Nationwide peers
380 violations · 559 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 with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Epcor - Holiday Harbor
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Arizona compares on the same EPA violation measures. Arizona 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.