Community Water System · PWS CA1510013
McFarland, City Of
Operator location McFarland, California - 35% of 157 violations are health-based (upper-third health share (> 23%)); groundwater source; 14,161 served per SDWIS.
- 14,161
- People served (this PWS)
- 157
- EPA violations (this PWS)
- 55
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
McFarland, City Of standing, high SDWIS violation third
35% of 157 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 35% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected. Population rank #3,629 of 29,740 among systems serving 500+.
The verdict
McFarland, City Of sits in the upper third of the sitemap cohort by violation count (157), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (14,161; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 35% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #3,629 of 29,740
- Population · /systems
- #416 of 1,701
- Population · CA
- 157
- Total EPA violations on record
- 35%
- 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
- 2,849
- County
- Kern
- School/Daycare
- No
- MCL Violations
- 55
- Monitoring Violations
- 99
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MR | 27 | 2017 |
| Total Haloacetic Acids (HAA5) | MR | 25 | 2017 |
| Arsenic | MCL | 22 | 2013 |
| Arsenic | MR | 19 | 2012 |
| Nitrate | MCL | 19 | 2023 |
| Coliform (TCR) | MCL | 14 | 2016 |
| Coliform (TCR) | MR | 12 | 2012 |
| Lead and Copper Rule | MR | 5 | 2021 |
| Nitrate | MR | 4 | 2013 |
| Revised Total Coliform Rule | MON | 2 | 2019 |
| E. COLI | MR | 2 | 2020 |
| Nitrate-Nitrite | MR | 2 | 2017 |
| Consumer Confidence Rule | Other | 2 | 2007 |
| Chlorine | MR | 1 | 2004 |
Violation Count vs. the National Corpus
McFarland, City Of has 157 recorded EPA violations, 82% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 18% carry more. 35% of this system's own violations are health-based (55 of 157), and it ranks #3,629 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)
157 Higher than most more violations than 82% 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 145 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| NMeFOSAA | 8/20/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTrDA | 8/20/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 8/20/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| 8:2 FTS | 8/20/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 8/20/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 8/20/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 8/20/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 8/20/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| NEtFOSAA | 8/20/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 8/20/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| 9Cl-PF3ONS | 8/20/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 8/20/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 8/20/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 8/20/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 8/20/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 8/20/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDoA | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 8/20/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 8/20/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 8/20/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 8/20/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 8/20/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 8:2 FTS | 8/20/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 8/20/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMBA | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 8/20/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFTA | 8/20/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 8/20/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 8/20/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 8/20/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFPeA | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 8/20/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFUnA | 8/20/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHpS | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 8/20/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
Health-based violations on McFarland, City Of
55 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for CA1510013.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
157 violations · 14,161 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 McFarland, City Of
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in California compares on the same EPA violation measures. California 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.