Community Water System · PWS MA4244001
Randolph/Holbrook Joint Water Board
Operator location Holbrook, Massachusetts - larger served population (> 3,309) at 45,767 people served; 16 SDWIS violations on record from surface water sources.
- 45,767
- People served (this PWS)
- 16
- EPA violations (this PWS)
- 2
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Randolph/Holbrook Joint Water Board standing, low SDWIS violation third
45,767 people served (SDWIS) - larger served population (> 3,309). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 13% is middle-third health share (≤ 23%). Population rank #1,205 of 29,740 among systems serving 500+.
The verdict
Randolph/Holbrook Joint Water Board is in the lower third by violation count (16; 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 (45,767; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 13% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #1,205 of 29,740
- Population · /systems
- #38 of 418
- Population · MA
- 16
- Total EPA violations on record
- 13%
- 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
- Local
- Connections
- 2
- County
- Norfolk
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 5
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | MR | 5 | 2021 |
| Interim Enhanced Surface Water Treatment Rule | TT | 2 | 2008 |
Violation Count vs. the National Corpus
Randolph/Holbrook Joint Water Board has 16 recorded EPA violations, 26% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 72% carry more. 13% of this system's own violations are health-based (2 of 16), and it ranks #1,205 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)
16 Lower than most fewer violations than 72% 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 Randolph/Holbrook Joint Water Board
EPA SDWIS lists 45,767 people served and 2 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · MassDEP, Drinking Water Program
Nationwide peers
16 violations · 45,767 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 Randolph/Holbrook Joint Water Board
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Massachusetts compares on the same EPA violation measures. Massachusetts 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.