Non-Transient Non-Community Water System · PWS RI1592025
Quonset Business Park
Operator location North Kingstown, Rhode Island - 23% of 259 violations are health-based (upper-third health share (> 23%)); groundwater source; 13,000 served per SDWIS.
- 13,000
- People served (this PWS)
- 259
- EPA violations (this PWS)
- 59
- Health-based (this PWS)
- 7 PFAS
- UCMR5 (this PWS)
Quonset Business Park standing, high SDWIS violation third
23% of 259 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 23% is upper-third health share (> 23%). UCMR5: upper-third PFAS panel (> 4 compounds). Population rank #3,872 of 29,740 among systems serving 500+.
The verdict
Quonset Business Park sits in the upper third of the sitemap cohort by violation count (259), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (13,000; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 23% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 detected 7 PFAS compounds (upper-third PFAS panel (> 4 compounds)).
- #3,872 of 29,740
- Population · /systems
- #16 of 73
- Population · RI
- 259
- Total EPA violations on record
- 23%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
7 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- State
- Connections
- 275
- County
- Washington
- School/Daycare
- No
- MCL Violations
- 55
- Monitoring Violations
- 130
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 55 | 2011 |
| Interim Enhanced Surface Water Treatment Rule | Other | 42 | 2023 |
| Coliform (TCR) | Other | 20 | 1991 |
| Lead and Copper Rule | MR | 18 | 2023 |
| Coliform (TCR) | MR | 13 | 2011 |
| Revised Total Coliform Rule | RPT | 5 | 2025 |
| Lead and Copper Rule | TT | 4 | 2022 |
| TTHM | MR | 3 | 2023 |
| Chlorine | MR | 3 | 2023 |
| Nitrate | MR | 3 | 2023 |
| Methoxychlor | MR | 3 | 2023 |
| Dalapon | MR | 3 | 2023 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2023 |
| Simazine | MR | 3 | 2023 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2023 |
| Picloram | MR | 3 | 2023 |
| Dinoseb | MR | 3 | 2023 |
| Aldicarb sulfoxide | MR | 3 | 2023 |
| Aldicarb sulfone | MR | 3 | 2023 |
| Atrazine | MR | 3 | 2023 |
| Heptachlor | MR | 3 | 2023 |
| Heptachlor epoxide | MR | 3 | 2023 |
| Benzo(a)pyrene | MR | 3 | 2023 |
| Pentachlorophenol | MR | 3 | 2023 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 3 | 2023 |
| Chlordane | MR | 3 | 2023 |
| HEXACHLOROBENZENE | MR | 3 | 2023 |
| Aldicarb | MR | 3 | 2023 |
| Endrin | MR | 3 | 2023 |
| 2,4,5-TP | MR | 3 | 2023 |
Violation Count vs. the National Corpus
Quonset Business Park has 259 recorded EPA violations, 89% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 11% carry more. 23% of this system's own violations are health-based (59 of 259), and it ranks #3,872 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)
259 Higher than most more violations than 89% 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. 26 of 174 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFMPA | 9/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 9/17/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/17/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| HFPO-DA | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFDoA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 9/17/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 9/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 9/17/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| ADONA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 9/17/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFDA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 9/17/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFBS | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 9/17/2024 | 5.50 ppt | 3.00 ppt | Detected |
| PFNA | 9/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 9/17/2024 | 4.00 ppt | 4.00 ppt | Detected |
| PFOA | 9/17/2024 | 7.80 ppt | 4.00 ppt | Detected |
| PFHpA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 9/17/2024 | 8.60 ppt | 3.00 ppt | Detected |
| PFNA | 9/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 9/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 9/17/2024 | 9.50 ppt | 4.00 ppt | Detected |
| PFDA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 9/17/2024 | 4.50 ppt | 3.00 ppt | Detected |
| PFUnA | 9/17/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBA | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 9/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 9/17/2024 | 4.60 ppt | 3.00 ppt | Detected |
| PFMBA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
Health-based violations on Quonset Business Park
59 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for RI1592025.
Sources: EPA SDWIS
Nationwide peers
259 violations · 13,000 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 similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Quonset Business Park
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Rhode Island compares on the same EPA violation measures. Rhode Island 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.