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LAKE CREEK RANCH MHC

PWS ID: OR4101429 · TANGENT, Oregon 97389

LAKE CREEK RANCH MHC serves 300 people in TANGENT, Oregon using Groundwater water sources. It has 124 recorded EPA violations, including 2 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: LAKE CREEK RANCH MHC

LAKE CREEK RANCH MHC is a private-owned community water system that delivers drinking water to 300 residents in TANGENT, Oregon (Linn County) through 113 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 124 total violations for this system , of which 2 (2%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 116 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 Nitrate, recorded in 11 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. LAKE CREEK RANCH MHC's 124 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
300
Total Violations
124
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
113
County
Linn
School/Daycare
No
MCL Violations
2
Monitoring Violations
116
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 11 2022
Coliform (TCR) MR 8 2015
Hexachlorocyclopentadiene MR 3 2020
Consumer Confidence Rule Other 3 2023
Lead and Copper Rule MR 3 1994
Coliform (TCR) MCL 2 1994
Endrin MR 2 2020
BHC-GAMMA MR 2 2020
Diquat MR 2 2020
Endothall MR 2 2020
Di(2-ethylhexyl) adipate MR 2 2020
Simazine MR 2 2020
Di(2-ethylhexyl) phthalate MR 2 2020
Dinoseb MR 2 2020
Carbofuran MR 2 2020
Atrazine MR 2 2020
LASSO MR 2 2020
Heptachlor MR 2 2020
Heptachlor epoxide MR 2 2020
2,4,5-TP MR 2 2020
HEXACHLOROBENZENE MR 2 2020
Total Polychlorinated Biphenyls (PCB) MR 2 2020
ETHYLENE DIBROMIDE MR 2 2020
Chlordane MR 2 2020
Methoxychlor MR 2 2020
Dalapon MR 2 2020
OXAMYL MR 2 2020
2,4-D MR 2 2020
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2020
Benzo(a)pyrene MR 2 2020

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 LAKE CREEK RANCH MHC.

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 OR4101429 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 E. COLI MR 1 SDWIS / OR4101429 / 3014
2023 Consumer Confidence Rule Other 3 SDWIS / OR4101429 / 7000
2022 Nitrate MR 11 SDWIS / OR4101429 / 1040
2020 Hexachlorocyclopentadiene MR 3 SDWIS / OR4101429 / 2042
2020 Endrin MR 2 SDWIS / OR4101429 / 2005
2020 BHC-GAMMA MR 2 SDWIS / OR4101429 / 2010
2020 Diquat MR 2 SDWIS / OR4101429 / 2032
2020 Endothall MR 2 SDWIS / OR4101429 / 2033
2020 Di(2-ethylhexyl) adipate MR 2 SDWIS / OR4101429 / 2035
2020 Simazine MR 2 SDWIS / OR4101429 / 2037
2020 Di(2-ethylhexyl) phthalate MR 2 SDWIS / OR4101429 / 2039
2020 Dinoseb MR 2 SDWIS / OR4101429 / 2041
2020 Carbofuran MR 2 SDWIS / OR4101429 / 2046
2020 Atrazine MR 2 SDWIS / OR4101429 / 2050
2020 LASSO MR 2 SDWIS / OR4101429 / 2051

How LAKE CREEK RANCH MHC Compares

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

Metric LAKE CREEK RANCH MHC Oregon avg Federal benchmark
Total violations 124 82.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 2 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 300 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 LAKE CREEK RANCH MHC water safe to drink? ▼
LAKE CREEK RANCH MHC (PWS ID: OR4101429) has 124 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 300 people using Groundwater sources.
How many people does LAKE CREEK RANCH MHC serve? ▼
LAKE CREEK RANCH MHC serves 300 people in TANGENT, Oregon. It is a Private-owned system using Groundwater water sources with 113 service connections.
What type of violations does LAKE CREEK RANCH MHC have? ▼
LAKE CREEK RANCH MHC has 124 total violations: 2 health-based violations (MCL exceedances or treatment failures), 116 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in LAKE CREEK RANCH MHC water? ▼
No PFAS testing data is available for LAKE CREEK RANCH MHC under the EPA's UCMR5 monitoring program.
What water source does LAKE CREEK RANCH MHC use? ▼
LAKE CREEK RANCH MHC 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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