Non-Transient Non-Community Water System · PWS CA5100136
East Nicolaus Joint Union High School
Operator location Nicolaus, California - smaller served population (≤ 999) at 330 people served; 12 SDWIS violations on record from groundwater sources.
- 330
- People served (this PWS)
- 12
- EPA violations (this PWS)
- 2
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
East Nicolaus Joint Union High School standing, low SDWIS violation third
330 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 17% is middle-third health share (≤ 23%).
The verdict
East Nicolaus Joint Union High School is in the lower third by violation count (12; lower-third violation load (≤ 21 violations)). A low count does not mean the system is unmonitored - monitoring and reporting violations still appear in SDWIS. Population served is smaller (330; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 17% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 12
- Total EPA violations on record
- 17%
- Health-based (MCL / treatment failure)
- 330
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 1
- County
- Sutter
- School/Daycare
- Yes
- MCL Violations
- 0
- Monitoring Violations
- 6
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | TT | 2 | 2018 |
| Nitrate | MR | 2 | 2000 |
| Revised Total Coliform Rule | MON | 2 | 2022 |
| Lead and Copper Rule | MR | 1 | 2023 |
| Coliform (TCR) | MR | 1 | 2010 |
Violation Count vs. the National Corpus
East Nicolaus Joint Union High School has 12 recorded EPA violations, 21% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 78% carry more. 17% of this system's own violations are health-based (2 of 12), 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)
12 Among the lowest violation counts fewer violations than 78% 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
Population served record for East Nicolaus Joint Union High School
EPA SDWIS lists 330 people served and 1 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
12 violations · 330 served: nearest cross-state SDWIS matches.
Cross-state systems with similarly light violation ledgers
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with East Nicolaus Joint Union High School
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.