Community Water System · PWS MA3330019
Haystack Estates
Operator location Tyngsborough, Massachusetts - smaller served population (≤ 999) at 60 people served; 35 SDWIS violations on record from groundwater sources.
- 60
- People served (this PWS)
- 35
- EPA violations (this PWS)
- 5
- Health-based (this PWS)
- 4 PFAS
- UCMR5 (this PWS)
Haystack Estates standing, mid SDWIS violation third
60 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 14% is middle-third health share (≤ 23%). UCMR5: middle-third PFAS panel (≤ 4 compounds).
The verdict
Haystack Estates lands in the middle third by violation volume (35), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (60; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 14% (middle-third health share (≤ 23%)). UCMR5 detected 4 PFAS compounds (middle-third PFAS panel (≤ 4 compounds)).
- 35
- Total EPA violations on record
- 14%
- Health-based (MCL / treatment failure)
- 60
- People served by this PWS (SDWIS)
- 4
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 5
- County
- Middlesex
- School/Daycare
- No
- MCL Violations
- 5
- Monitoring Violations
- 19
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 7 | 2021 |
| Combined Uranium | MR | 6 | 2009 |
| Combined Uranium | MCL | 5 | 2010 |
| Nitrate | MR | 4 | 1994 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 2014 |
| TTHM | MR | 2 | 2005 |
| Nitrite | MR | 2 | 1994 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2005 |
| Chlorine | MR | 1 | 2005 |
Violation Count vs. the National Corpus
Haystack Estates has 35 recorded EPA violations, 46% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 53% carry more. 14% of this system's own violations are health-based (5 of 35), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
35 Lower than most fewer violations than 53% 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
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 6 of 58 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFUnA | 5/6/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 5/6/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 5/6/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 5/6/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 5/6/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 5/6/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 5/6/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 5/6/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 8:2 FTS | 5/6/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 5/6/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 5/6/2025 | 3.00 ppt | 3.00 ppt | Detected |
| PFMBA | 5/6/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 5/6/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 5/6/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFHpS | 5/6/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 5/6/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 5/6/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFPeS | 5/6/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| NMeFOSAA | 5/6/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 5/6/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFDoA | 5/6/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 5/6/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFBS | 5/6/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 5/6/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 5/6/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 5/6/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 5/6/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 5/6/2025 | 5.20 ppt | 4.00 ppt | Detected |
| PFDA | 5/6/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 11/4/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFEESA | 11/4/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 11/4/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 11/4/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 11/4/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 11/4/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 11/4/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 11/4/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 11/4/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 11/4/2025 | 3.80 ppt | 3.00 ppt | Detected |
| PFHpS | 11/4/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 11/4/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFDoA | 11/4/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 11/4/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMBA | 11/4/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 11/4/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBS | 11/4/2025 | 3.30 ppt | 3.00 ppt | Detected |
| PFUnA | 11/4/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| NMeFOSAA | 11/4/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTA | 11/4/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| NEtFOSAA | 11/4/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
Population served record for Haystack Estates
EPA SDWIS lists 60 people served and 5 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
35 violations · 60 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Haystack Estates
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.