Community Water System · PWS MN1070001
Amboy
Operator location Amboy, Minnesota - 60% of 53 violations are health-based (upper-third health share (> 23%)); groundwater source; 535 served per SDWIS.
- 535
- People served (this PWS)
- 53
- EPA violations (this PWS)
- 32
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Amboy standing, mid SDWIS violation third
60% of 53 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 60% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected. Population rank #27,827 of 29,740 among systems serving 500+.
The verdict
Amboy lands in the middle third by violation volume (53), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (535; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 60% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #27,827 of 29,740
- Population · /systems
- #608 of 677
- Population · MN
- 53
- Total EPA violations on record
- 60%
- 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
- 255
- County
- Blue Earth
- School/Daycare
- No
- MCL Violations
- 32
- Monitoring Violations
- 16
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 19 | 2015 |
| Combined Radium (-226 and -228) | MCL | 13 | 2022 |
| Coliform (TCR) | MR | 8 | 2014 |
| Chlorine | MR | 4 | 2014 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2021 |
| TTHM | MR | 1 | 2021 |
Violation Count vs. the National Corpus
Amboy has 53 recorded EPA violations, 58% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 41% carry more. 60% of this system's own violations are health-based (32 of 53), and it ranks #27,827 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)
53 Around the middle fewer violations than 41% 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. 0 of 58 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFNA | 4/11/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 9Cl-PF3ONS | 4/11/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 4/11/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 4/11/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 4/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 4/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 4/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 4/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 4/11/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 4/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 4/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 4/11/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFOA | 4/11/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| HFPO-DA | 4/11/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 4/11/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 4/11/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 4/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 4/11/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 4/11/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 4/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 4/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 4/11/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 4/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 4/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 4/11/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFMBA | 4/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 4/11/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 4/11/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 4/11/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFDA | 10/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 10/11/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 10/11/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 10/11/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 10/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 10/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 10/11/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFHpA | 10/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 10/11/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 10/11/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 10/11/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFPeS | 10/11/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBS | 10/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 10/11/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 10/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 10/11/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFHxA | 10/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 10/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 10/11/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFEESA | 10/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 10/11/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
Health-based violations on Amboy
32 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MN1070001.
Sources: EPA SDWIS
Nationwide peers
53 violations · 535 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.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Amboy
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Minnesota compares on the same EPA violation measures. Minnesota 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.