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States → EPA Region 10 — Tribal Water Systems

Community Water System · PWS 105300144

Madison Estates

Tulalip, EPA Region 10 — Tribal Water Systems 98271 - drinking water served from groundwater sources to 86 people, tracked in EPA SDWIS and UCMR5.

86
People served
179
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 179 drinking-water violations at Madison Estates.

179
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
86
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Madison Estates

Madison Estates is a native american-owned community water system that delivers drinking water to 86 residents in Tulalip, EPA Region 10 — Tribal Water Systems through 24 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 179 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 176 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is 1,2,4-Trichlorobenzene, recorded in 4 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

EPA Region 10 — Tribal Water Systems has thousands of regulated public water systems tracked by EPA under the Safe Drinking Water Act.

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
86
Total Violations
179
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
24
School/Daycare
No
MCL Violations
0
Monitoring Violations
176
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2,4-Trichlorobenzene MR 4 2017
cis-1,2-Dichloroethylene MR 4 2017
Xylenes, Total MR 4 2017
DICHLOROMETHANE MR 4 2017
o-Dichlorobenzene MR 4 2017
p-Dichlorobenzene MR 4 2017
Vinyl chloride MR 4 2017
1,1-Dichloroethylene MR 4 2017
1,2-Dichloroethane MR 4 2017
Carbon tetrachloride MR 4 2017
1,2-Dichloropropane MR 4 2017
Trichloroethylene MR 4 2017
Benzene MR 4 2017
Toluene MR 4 2017
Ethylbenzene MR 4 2017
Styrene MR 4 2017
Total Haloacetic Acids (HAA5) MR 4 2022
CHLOROBENZENE MR 4 2017
trans-1,2-Dichloroethylene MR 4 2017
1,1,1-Trichloroethane MR 4 2017
1,1,2-Trichloroethane MR 4 2017
Tetrachloroethylene MR 4 2017
Chlorine MR 3 2019
Consumer Confidence Rule Other 3 2015
Nitrate MR 3 2019
TTHM MR 3 2022
Endrin MR 2 2010
Total Polychlorinated Biphenyls (PCB) MR 2 2010
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2010
Chlordane MR 2 2010

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 Madison Estates.

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 105300144 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 10 — Tribal Water Systems Drinking Water Authority

EPA Region 10 — Tribal Water Systems's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find 10 regulator via EPA SDWIS

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
2022 Total Haloacetic Acids (HAA5) MR 4 SDWIS / 105300144 / 2456
2022 TTHM MR 3 SDWIS / 105300144 / 2950
2019 Chlorine MR 3 SDWIS / 105300144 / 0999
2019 Nitrate MR 3 SDWIS / 105300144 / 1040
2019 Lead and Copper Rule MR 2 SDWIS / 105300144 / 5000
2017 1,2,4-Trichlorobenzene MR 4 SDWIS / 105300144 / 2378
2017 cis-1,2-Dichloroethylene MR 4 SDWIS / 105300144 / 2380
2017 Xylenes, Total MR 4 SDWIS / 105300144 / 2955
2017 DICHLOROMETHANE MR 4 SDWIS / 105300144 / 2964
2017 o-Dichlorobenzene MR 4 SDWIS / 105300144 / 2968
2017 p-Dichlorobenzene MR 4 SDWIS / 105300144 / 2969
2017 Vinyl chloride MR 4 SDWIS / 105300144 / 2976
2017 1,1-Dichloroethylene MR 4 SDWIS / 105300144 / 2977
2017 1,2-Dichloroethane MR 4 SDWIS / 105300144 / 2980
2017 Carbon tetrachloride MR 4 SDWIS / 105300144 / 2982

How Madison Estates Compares

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

Metric Madison Estates EPA Region 10 — Tribal Water Systems avg Federal benchmark
Total violations 179 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 86 - Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across all regulated public water systems in EPA Region 10 — Tribal Water Systems.

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 Madison Estates water safe to drink? ▼
Madison Estates (PWS ID: 105300144) has 179 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 86 people using Groundwater sources.
How many people does Madison Estates serve? ▼
Madison Estates serves 86 people in Tulalip, EPA Region 10 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 24 service connections.
What type of violations does Madison Estates have? ▼
Madison Estates has 179 total violations: 0 health-based violations (MCL exceedances or treatment failures), 176 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Madison Estates water? ▼
No PFAS testing data is available for Madison Estates under the EPA's UCMR5 monitoring program.
What water source does Madison Estates use? ▼
Madison Estates uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
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.