Community Water System · PWS AZ0402038
Whetstone Dwid
Operator location Huachuca City, Arizona - smaller served population (≤ 999) at 940 people served; 105 SDWIS violations on record from groundwater sources.
- 940
- People served (this PWS)
- 105
- EPA violations (this PWS)
- 2
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Whetstone Dwid standing, high SDWIS violation third
940 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 2% is middle-third health share (≤ 23%). Population rank #20,537 of 29,740 among systems serving 500+.
The verdict
Whetstone Dwid sits in the upper third of the sitemap cohort by violation count (105), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (940; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 2% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #20,537 of 29,740
- Population · /systems
- #285 of 413
- Population · AZ
- 105
- Total EPA violations on record
- 2%
- 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
- Community
- Owner Type
- Public/Private
- Connections
- 370
- County
- Cochise
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 90
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 14 | 2021 |
| Mercury | MR | 12 | 2001 |
| Coliform (TCR) | MR | 9 | 2013 |
| Consumer Confidence Rule | Other | 8 | 2017 |
| Lead and Copper Rule | MR | 6 | 2022 |
| TTHM | MR | 3 | 2011 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2011 |
| Revised Total Coliform Rule | MON | 3 | 2020 |
| Coliform (TCR) | MCL | 2 | 2002 |
| Xylenes, Total | MR | 1 | 1998 |
| DICHLOROMETHANE | MR | 1 | 1998 |
| Trichloroethylene | MR | 1 | 1998 |
| BHC-GAMMA | MR | 1 | 1998 |
| Dalapon | MR | 1 | 1998 |
| Diquat | MR | 1 | 1998 |
| Endothall | MR | 1 | 1998 |
| Di(2-ethylhexyl) adipate | MR | 1 | 1998 |
| Picloram | MR | 1 | 1998 |
| Dinoseb | MR | 1 | 1998 |
| Hexachlorocyclopentadiene | MR | 1 | 1998 |
| Heptachlor | MR | 1 | 1998 |
| 2,4,5-TP | MR | 1 | 1998 |
| HEXACHLOROBENZENE | MR | 1 | 1998 |
| Benzo(a)pyrene | MR | 1 | 1998 |
| Pentachlorophenol | MR | 1 | 1998 |
| ETHYLENE DIBROMIDE | MR | 1 | 1998 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1980 |
| Barium | MR | 1 | 1979 |
| Nitrate | MR | 1 | 1979 |
| Fluoride | MR | 1 | 1979 |
Violation Count vs. the National Corpus
Whetstone Dwid has 105 recorded EPA violations, 74% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 26% carry more. 2% of this system's own violations are health-based (2 of 105), and it ranks #20,537 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)
105 Around the middle fewer violations than 26% 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
Population served record for Whetstone Dwid
EPA SDWIS lists 940 people served and 370 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
105 violations · 940 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 Whetstone Dwid
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.