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TIERRA LINDA ESTATES

PWS ID: OR4101044 · SPRING, Oregon 77386

TIERRA LINDA ESTATES serves 450 people in SPRING, Oregon using Groundwater water sources. It has 171 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: TIERRA LINDA ESTATES

TIERRA LINDA ESTATES is a private-owned community water system that delivers drinking water to 450 residents in SPRING, Oregon (Umatilla County) through 106 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 171 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 159 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 25 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 Oregon, EPA tracks 2,518 public water systems serving 4,005,242 people, with 206,659 cumulative violations and 20,339 health-based violations on record. About 99% of systems in the state carry at least one violation, and state-wide the average per system is 82.1 violations. TIERRA LINDA ESTATES's 171 violations sit above the Oregon average. Statewide, 30 of 125 UCMR5-tested systems have reported PFAS detections (24%). 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
450
Total Violations
171
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
106
County
Umatilla
School/Daycare
No
MCL Violations
0
Monitoring Violations
159
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 25 2015
Revised Total Coliform Rule MON 18 2025
Consumer Confidence Rule Other 10 2025
Nitrate MR 10 2024
Lead and Copper Rule MR 4 2018
BHC-GAMMA MR 2 2014
Methoxychlor MR 2 2014
Toxaphene MR 2 2014
Dalapon MR 2 2014
Endothall MR 2 2014
Glyphosate MR 2 2014
Di(2-ethylhexyl) adipate MR 2 2014
OXAMYL MR 2 2014
Picloram MR 2 2014
Hexachlorocyclopentadiene MR 2 2014
Carbofuran MR 2 2014
Heptachlor MR 2 2014
Heptachlor epoxide MR 2 2014
2,4,5-TP MR 2 2014
ETHYLENE DIBROMIDE MR 2 2014
Chlordane MR 2 2014
p-Dichlorobenzene MR 2 2014
trans-1,2-Dichloroethylene MR 2 2014
1,1,1-Trichloroethane MR 2 2014
Carbon tetrachloride MR 2 2014
1,2-Dichloropropane MR 2 2014
1,1,2-Trichloroethane MR 2 2014
Tetrachloroethylene MR 2 2014
CHLOROBENZENE MR 2 2014
Toluene MR 2 2014

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 TIERRA LINDA 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 OR4101044 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Oregon Drinking Water Authority

Oregon'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 OR 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
2025 Revised Total Coliform Rule MON 18 SDWIS / OR4101044 / 8000
2025 Consumer Confidence Rule Other 10 SDWIS / OR4101044 / 7000
2024 Nitrate MR 10 SDWIS / OR4101044 / 1040
2018 Lead and Copper Rule MR 4 SDWIS / OR4101044 / 5000
2015 Coliform (TCR) MR 25 SDWIS / OR4101044 / 3100
2014 BHC-GAMMA MR 2 SDWIS / OR4101044 / 2010
2014 Methoxychlor MR 2 SDWIS / OR4101044 / 2015
2014 Toxaphene MR 2 SDWIS / OR4101044 / 2020
2014 Dalapon MR 2 SDWIS / OR4101044 / 2031
2014 Endothall MR 2 SDWIS / OR4101044 / 2033
2014 Glyphosate MR 2 SDWIS / OR4101044 / 2034
2014 Di(2-ethylhexyl) adipate MR 2 SDWIS / OR4101044 / 2035
2014 OXAMYL MR 2 SDWIS / OR4101044 / 2036
2014 Picloram MR 2 SDWIS / OR4101044 / 2040
2014 Hexachlorocyclopentadiene MR 2 SDWIS / OR4101044 / 2042

How TIERRA LINDA ESTATES Compares

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

Metric TIERRA LINDA ESTATES Oregon avg Federal benchmark
Total violations 171 82.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 0 8.1 Indicates a contaminant exceeded a federal MCL
PFAS detection None 24% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 450 1,591 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,518 regulated public water systems in Oregon.

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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is TIERRA LINDA ESTATES water safe to drink? ▼
TIERRA LINDA ESTATES (PWS ID: OR4101044) has 171 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 450 people using Groundwater sources.
How many people does TIERRA LINDA ESTATES serve? ▼
TIERRA LINDA ESTATES serves 450 people in SPRING, Oregon. It is a Private-owned system using Groundwater water sources with 106 service connections.
What type of violations does TIERRA LINDA ESTATES have? ▼
TIERRA LINDA ESTATES has 171 total violations: 0 health-based violations (MCL exceedances or treatment failures), 159 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in TIERRA LINDA ESTATES water? ▼
No PFAS testing data is available for TIERRA LINDA ESTATES under the EPA's UCMR5 monitoring program.
What water source does TIERRA LINDA ESTATES use? ▼
TIERRA LINDA 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.

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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.

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