Non-Transient Non-Community Water System · PWS GU0000018
Guam International Airport Authority
Operator location Tamuning, Guam - 0% of 2 violations are health-based (lower-third health share (≤ 1%)); groundwater source; 138,336 served per SDWIS.
- 138,336
- People served (this PWS) Larger third of systems
- 2
- EPA violations (this PWS) Lower third of systems
- 0
- Health-based (this PWS) Lower third by health-based share
- Untested
- UCMR5 (this PWS) No UCMR5 result
Guam International Airport Authority standing, low SDWIS violation third
0% of 2 recorded violations are health-based - lower-third health share (≤ 1%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 0% is lower-third health share (≤ 1%). Population rank #322 of 29,740 among systems serving 500+.
The verdict
Guam International Airport Authority is in the lower third by violation count (2; lower-third violation load (≤ 21 violations)). A low count does not mean the system is unmonitored - monitoring and reporting violations still appear in SDWIS. Population served is large (138,336; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is only 0% - almost all of this trail is monitoring or reporting. No UCMR5 PFAS test appears for this system in this extract.
- #322 of 29,740
- Population · /systems
- #2 of 8
- Population · GU
- 2
- Total EPA violations on record
- 0%
- 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
- Non-Transient Non-Community
- Owner Type
- State
- Connections
- 27
- County
- Guam
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 2
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Groundwater Rule | MR | 2 | 2025 |
Violation Count vs. the National Corpus
Guam International Airport Authority has 2 recorded EPA violations, 5% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 93% carry more. 0% of this system's own violations are health-based (0 of 2), and it ranks #322 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)
2 Among the lowest violation counts fewer 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
Guam International Airport Authority 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 Guam International Airport Authority
0 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for GU0000018.
Sources: EPA SDWIS
Nationwide peers
2 violations · 138,336 served: nearest cross-state SDWIS matches.
Cross-state systems with similarly light violation ledgers
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Guam International Airport Authority
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Guam compares on the same EPA violation measures. Guam 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.