Community Water System · PWS CA1010030
Tranquillity Irrigation District
Operator location Tranquillity, California - 74% of 96 violations are health-based (upper-third health share (> 23%)); groundwater source; 807 served per SDWIS.
- 807
- People served (this PWS)
- 96
- EPA violations (this PWS)
- 71
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Tranquillity Irrigation District standing, high SDWIS violation third
74% of 96 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 74% is upper-third health share (> 23%). Population rank #22,303 of 29,740 among systems serving 500+.
The verdict
Tranquillity Irrigation District sits in the upper third of the sitemap cohort by violation count (96), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (807; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 74% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #22,303 of 29,740
- Population · /systems
- #1,318 of 1,701
- Population · CA
- 96
- Total EPA violations on record
- 74%
- 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
- 340
- County
- Fresno
- School/Daycare
- No
- MCL Violations
- 70
- Monitoring Violations
- 23
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 52 | 2014 |
| Coliform (TCR) | MCL | 18 | 2015 |
| Coliform (TCR) | MR | 13 | 2013 |
| Nitrate | MR | 5 | 2012 |
| Lead and Copper Rule | MR | 3 | 2024 |
| Revised Total Coliform Rule | MON | 2 | 2017 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
Violation Count vs. the National Corpus
Tranquillity Irrigation District has 96 recorded EPA violations, 72% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 27% carry more. 74% of this system's own violations are health-based (71 of 96), and it ranks #22,303 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)
96 Around the middle fewer violations than 27% 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
Health-based violations on Tranquillity Irrigation District
71 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for CA1010030.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
96 violations · 807 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 smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Tranquillity Irrigation District
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.