Community Water System · PWS FL2541086
St. John's Harbor
Operator location Palatka, Florida - smaller served population (≤ 999) at 325 people served; 189 SDWIS violations on record from groundwater sources.
- 325
- People served (this PWS)
- 189
- EPA violations (this PWS)
- 9
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
St. John's Harbor standing, high SDWIS violation third
325 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 5% is middle-third health share (≤ 23%). UCMR5: UCMR5 tested, none detected.
The verdict
St. John's Harbor sits in the upper third of the sitemap cohort by violation count (189), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (325; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 5% (middle-third health share (≤ 23%)). UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- 189
- Total EPA violations on record
- 5%
- Health-based (MCL / treatment failure)
- 325
- People served by this PWS (SDWIS)
- 0
- PFAS compounds detected (UCMR5)
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
- 145
- County
- Putnam
- School/Daycare
- No
- MCL Violations
- 9
- Monitoring Violations
- 147
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | MON | 41 | 2025 |
| E. COLI | MR | 41 | 2025 |
| Nitrate | MR | 15 | 2024 |
| Coliform (TCR) | MCL | 9 | 2008 |
| TTHM | MR | 8 | 2024 |
| Coliform (TCR) | MR | 5 | 2009 |
| Lead and Copper Rule | MR | 5 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2014 |
| Consumer Confidence Rule | Other | 4 | 2024 |
| Mercury | MR | 4 | 1984 |
| Fluoride | MR | 4 | 1984 |
| Chromium | MR | 4 | 1984 |
| Barium | MR | 4 | 1984 |
| Selenium | MR | 4 | 1984 |
| Cadmium | MR | 4 | 1984 |
| Arsenic | MR | 4 | 1984 |
| Public Notice | Other | 1 | 2015 |
Violation Count vs. the National Corpus
St. John's Harbor has 189 recorded EPA violations, 84% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 15% carry more. 5% of this system's own violations are health-based (9 of 189), 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)
189 Higher than most more violations than 84% 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 |
|---|---|---|---|---|
| 6:2 FTS | 9/13/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMBA | 9/13/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 9/13/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 9/13/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 9/13/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 9/13/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 9/13/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFPeA | 9/13/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 9/13/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/13/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| NEtFOSAA | 9/13/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 9/13/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFDA | 9/13/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 9/13/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 9/13/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 9/13/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFHxS | 9/13/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 9/13/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| HFPO-DA | 9/13/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOA | 9/13/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFMPA | 9/13/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDoA | 9/13/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 9/13/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 9/13/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| 8:2 FTS | 9/13/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/13/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 9/13/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 9/13/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 4:2 FTS | 9/13/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 3/8/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBS | 3/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 3/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 3/8/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFOS | 3/8/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 3/8/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 3/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 3/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 3/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 3/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 3/8/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 3/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBA | 3/8/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 3/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 3/8/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeA | 3/8/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 3/8/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| NMeFOSAA | 3/8/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 3/8/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 3/8/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| NFDHA | 3/8/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
Population served record for St. John's Harbor
EPA SDWIS lists 325 people served and 145 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · Florida Department of Environmental Protection, Drinking Water Program
Nationwide peers
189 violations · 325 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.
What to do with St. John's Harbor
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Florida compares on the same EPA violation measures. Florida 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.