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Non-Transient Non-Community Water System · PWS CA4400757

Alianza Charter School/Wcsa

Watsonville, California 95076 - drinking water served from groundwater sources to 670 people, tracked in EPA SDWIS and UCMR5.

670
People served
17
EPA violations
1
Health-based
Untested
UCMR5 result

The verdict

EPA records 17 drinking-water violations at Alianza Charter School/Wcsa, 6% of them health-based - below the California per-system average.

17
Total EPA violations on record
6%
Health-based (MCL / treatment failure)
670
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Alianza Charter School/Wcsa

Alianza Charter School/Wcsa is a local-owned non-transient non-community water system that delivers drinking water to 670 residents in Watsonville, California (Santa Cruz County) through 3 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 17 total violations for this system , of which 1 (6%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 10 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 6 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across California, EPA tracks 7,249 public water systems serving 42,404,883 people, with 153,308 cumulative violations and 63,983 health-based violations on record. About 89% of systems in the state carry at least one violation, and state-wide the average per system is 21.1 violations. Statewide, 447 of 694 UCMR5-tested systems have reported PFAS detections (64.4%).

Alianza Charter School/Wcsa's 17 violations sit below the California average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
670
Total Violations
17
Health-Based Violations
1
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
3
County
Santa Cruz
School/Daycare
Yes
MCL Violations
0
Monitoring Violations
10
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 6 2007
Lead and Copper Rule MR 2 2021
Nitrate MR 2 2021
LEAD AND COPPER RULE REVISIONS RPT 1 2024
LEAD AND COPPER RULE REVISIONS TT 1 2024

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Alianza Charter School/Wcsa.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID CA4400757 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

California Drinking Water Authority

California State Water Resources Control Board, Division of Drinking Water is the primacy agency that licenses and inspects Alianza Charter School/Wcsa under EPA-delegated authority.

Open CA regulator portal

Source: California State Water Resources Control Board, Division of Drinking Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / CA4400757 / 5200
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / CA4400757 / 5200
2021 Lead and Copper Rule MR 2 SDWIS / CA4400757 / 5000
2021 Nitrate MR 2 SDWIS / CA4400757 / 1040
2007 Coliform (TCR) MR 6 SDWIS / CA4400757 / 3100

How Alianza Charter School/Wcsa Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Alianza Charter School/Wcsa California avg Federal benchmark
Total violations 17 21.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 1 8.8 Indicates a contaminant exceeded a federal MCL
PFAS detection None 64.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 670 5,850 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 7,249 regulated public water systems in California.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Alianza Charter School/Wcsa water safe to drink? ▼
Alianza Charter School/Wcsa (PWS ID: CA4400757) has 17 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 670 people using Groundwater sources.
How many people does Alianza Charter School/Wcsa serve? ▼
Alianza Charter School/Wcsa serves 670 people in Watsonville, California. It is a Local-owned system using Groundwater water sources with 3 service connections.
What type of violations does Alianza Charter School/Wcsa have? ▼
Alianza Charter School/Wcsa has 17 total violations: 1 health-based violations (MCL exceedances or treatment failures), 10 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Alianza Charter School/Wcsa water? ▼
No PFAS testing data is available for Alianza Charter School/Wcsa under the EPA's UCMR5 monitoring program.
What water source does Alianza Charter School/Wcsa use? ▼
Alianza Charter School/Wcsa uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.