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Non-Transient Non-Community Water System · PWS CA4100605

Skylawn Memorial Park (Skylawn Inc)

San Mateo, California 94402 - drinking water served from groundwater sources to 50 people, tracked in EPA SDWIS and UCMR5.

50
People served
131
EPA violations
6
Health-based
Untested
UCMR5 result

The verdict

EPA records 131 drinking-water violations at Skylawn Memorial Park (Skylawn Inc), 5% of them health-based - above the California per-system average.

131
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
50
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Skylawn Memorial Park (Skylawn Inc)

Skylawn Memorial Park (Skylawn Inc) is a private-owned non-transient non-community water system that delivers drinking water to 50 residents in San Mateo, California (San Mateo County) through 3 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 131 total violations for this system , of which 6 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 124 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 5 violations (MCL, health-based). 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%).

Skylawn Memorial Park (Skylawn Inc)'s 131 violations sit above 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
50
Total Violations
131
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
3
County
San Mateo
School/Daycare
No
MCL Violations
5
Monitoring Violations
124
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 5 2014
Nickel MR 2 2009
Barium MR 2 2009
Chromium MR 2 2009
Thallium, Total MR 2 2009
Selenium MR 2 2009
Carbon tetrachloride MR 2 2009
Benzene MR 2 2009
Ethylbenzene MR 2 2009
DICHLOROMETHANE MR 2 2009
Tetrachloroethylene MR 2 2009
1,1-Dichloroethylene MR 2 2009
1,1,1-Trichloroethane MR 2 2009
1,1,2-Trichloroethane MR 2 2009
p-Dichlorobenzene MR 2 2009
Vinyl chloride MR 2 2009
Trichloroethylene MR 2 2009
Styrene MR 2 2009
Xylenes, Total MR 2 2009
Benzo(a)pyrene MR 2 2009
Dalapon MR 2 2009
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2009
Di(2-ethylhexyl) phthalate MR 2 2009
BHC-GAMMA MR 2 2009
Heptachlor epoxide MR 2 2009
Methoxychlor MR 2 2009
HEXACHLOROBENZENE MR 2 2009
ETHYLENE DIBROMIDE MR 2 2009
Dinoseb MR 2 2009
Di(2-ethylhexyl) adipate MR 2 2009

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 Skylawn Memorial Park (Skylawn Inc).

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 CA4100605 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 Skylawn Memorial Park (Skylawn Inc) 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 TT 1 SDWIS / CA4100605 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / CA4100605 / 5200
2014 Coliform (TCR) MCL 5 SDWIS / CA4100605 / 3100
2009 Nickel MR 2 SDWIS / CA4100605 / 1036
2009 Barium MR 2 SDWIS / CA4100605 / 1010
2009 Chromium MR 2 SDWIS / CA4100605 / 1020
2009 Thallium, Total MR 2 SDWIS / CA4100605 / 1085
2009 Selenium MR 2 SDWIS / CA4100605 / 1045
2009 Carbon tetrachloride MR 2 SDWIS / CA4100605 / 2982
2009 Benzene MR 2 SDWIS / CA4100605 / 2990
2009 Ethylbenzene MR 2 SDWIS / CA4100605 / 2992
2009 DICHLOROMETHANE MR 2 SDWIS / CA4100605 / 2964
2009 Tetrachloroethylene MR 2 SDWIS / CA4100605 / 2987
2009 1,1-Dichloroethylene MR 2 SDWIS / CA4100605 / 2977
2009 1,1,1-Trichloroethane MR 2 SDWIS / CA4100605 / 2981

How Skylawn Memorial Park (Skylawn Inc) Compares

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

Metric Skylawn Memorial Park (Skylawn Inc) California avg Federal benchmark
Total violations 131 21.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 6 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 50 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 Skylawn Memorial Park (Skylawn Inc) water safe to drink? ▼
Skylawn Memorial Park (Skylawn Inc) (PWS ID: CA4100605) has 131 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 50 people using Groundwater sources.
How many people does Skylawn Memorial Park (Skylawn Inc) serve? ▼
Skylawn Memorial Park (Skylawn Inc) serves 50 people in San Mateo, California. It is a Private-owned system using Groundwater water sources with 3 service connections.
What type of violations does Skylawn Memorial Park (Skylawn Inc) have? ▼
Skylawn Memorial Park (Skylawn Inc) has 131 total violations: 6 health-based violations (MCL exceedances or treatment failures), 124 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Skylawn Memorial Park (Skylawn Inc) water? ▼
No PFAS testing data is available for Skylawn Memorial Park (Skylawn Inc) under the EPA's UCMR5 monitoring program.
What water source does Skylawn Memorial Park (Skylawn Inc) use? ▼
Skylawn Memorial Park (Skylawn Inc) 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.