Community Water System · PWS MT0003780
Valley Grove Subdivision
Operator location Belgrade, Montana - smaller served population (≤ 999) at 825 people served; 148 SDWIS violations on record from groundwater sources.
- 825
- People served (this PWS)
- 148
- EPA violations (this PWS)
- 25
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Valley Grove Subdivision standing, high SDWIS violation third
825 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 17% is middle-third health share (≤ 23%). Population rank #22,084 of 29,740 among systems serving 500+.
The verdict
Valley Grove Subdivision sits in the upper third of the sitemap cohort by violation count (148), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (825; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 17% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #22,084 of 29,740
- Population · /systems
- #157 of 283
- Population · MT
- 148
- Total EPA violations on record
- 17%
- 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
- Private
- Connections
- 351
- County
- Gallatin
- School/Daycare
- No
- MCL Violations
- 25
- Monitoring Violations
- 101
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 25 | 2015 |
| Consumer Confidence Rule | Other | 22 | 2020 |
| Coliform (TCR) | MR | 18 | 2011 |
| Lead and Copper Rule | MR | 14 | 2015 |
| E. COLI | MR | 12 | 2012 |
| Nitrate-Nitrite | MR | 9 | 2005 |
| Di(2-ethylhexyl) phthalate | MR | 5 | 2015 |
| Chromium | MR | 3 | 1999 |
| Fluoride | MR | 3 | 1999 |
| Mercury | MR | 3 | 1999 |
| Nickel | MR | 3 | 1999 |
| OXAMYL | MR | 3 | 1999 |
| Arsenic | MR | 3 | 1999 |
| Asbestos | MR | 3 | 2011 |
| Barium | MR | 3 | 1999 |
| Cadmium | MR | 3 | 1999 |
| Antimony, Total | MR | 3 | 1999 |
| Combined Radium (-226 and -228) | MR | 3 | 2008 |
| Thallium, Total | MR | 3 | 1999 |
| Beryllium, Total | MR | 3 | 1999 |
| Selenium | MR | 3 | 1999 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 2008 |
Violation Count vs. the National Corpus
Valley Grove Subdivision has 148 recorded EPA violations, 81% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 19% carry more. 17% of this system's own violations are health-based (25 of 148), and it ranks #22,084 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)
148 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
Population served record for Valley Grove Subdivision
EPA SDWIS lists 825 people served and 351 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
148 violations · 825 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 Valley Grove Subdivision
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Montana compares on the same EPA violation measures. Montana 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.