Is Tangent, OR Tap Water Safe to Drink?
Graded C — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
60/100
waterverge.com Tangent, OR — Water Quality Report
Tangent's drinking water received a grade of C (60 out of 100), indicating fair water quality. The city's 4 water systems serve approximately 649 residents using groundwater.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 352 violations on record, including 7 health-based violations. 24 remain unresolved.
What to know about Tangent's water
Tangent ranks #108 out of 213 cities in Oregon for water quality, placing it below average in the state.
Tangent relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
As a small community water system, Tangent may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 9 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Tangent, OR water safe to drink?
Tangent's drinking water has significant quality concerns based on EPA testing data. With a grade of C (60/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 4 water systems serve approximately 649 residents using groundwater (wells).
Recent water quality updates for Tangent
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Tangent's water quality assessment. Grade: C (60/100).
Contaminants: Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
Federal disaster declaration (FEMA DR-4452). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4055). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Tangent's water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Violation history
Tangent's water system has 352 total violations on record, including 7 health-based violations. 24 remain unresolved. 9 violations were issued in the last 5 years.
Flood & environmental risk
Linn County has experienced 6 federally declared disasters since 1964. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Willamette River, Calapooia River.
Where does Tangent's water come from?
Tangent's drinking water comes from groundwater (wells), supplied by 4 water systems serving approximately 649 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Willamette River (river), Calapooia River (river).
What Tangent residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Tangent's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Tangent's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Tangent
Industrial polluters nearby
Reported releases to surface water by facilities near Tangent, ranked by pounds discharged annually.
Total reported releases to surface water: 244 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
ATI SPECIALTY ALLOYS & COMPONENTS LLC ALBANY, OR97321 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 211 | 7.7 mi |
HOLLINGSWORTH & VOSE FIBER CO CORVALLIS, OR97333 | Barium And Barium Compounds | 23 | 7.2 mi |
BAKELITE CHEMICALS LLC ALBANY, OR97321 | Ammonia | 10 | 8.3 mi |
ARAUCO N.A. INC. - DURAFLAKE PARTICLEBOARD ALBANY, OR97321 | — | — | 8.5 mi |
CLAYTON ALBANY ALBANY, OR97321 | — | — | 4.9 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Tangent
Superfund sites nearby
Federally tracked hazardous-waste sites on the EPA National Priorities List. Proximity does not necessarily indicate tap-water contamination — the connection depends on hydrology and treatment.
- TELEDYNE WAH CHANG8.1 mi
- UNITED CHROME PRODUCTS INC9.1 mi
Source: EPA Superfund National Priorities List
Drought conditions
D2 — severe droughtLinn County is currently in D2 (severe drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Linn County has experienced 6 federally declared disasters since 1964. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Tangent's water supply, we recommend the following filter types.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.0 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 1.56 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level (90th percentile)
Latest reading: 1.565 mg/L (2000)
EPA action level: 1.3 mg/L
See how Tangent compares by contaminant
Explore where Tangent ranks among all Oregon cities for specific contaminants.
Water source & infrastructure
Where Tangent's water comes from
Tangent's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by private ownership and serves approximately 649 people through 4 water systems.
Water bodies near Tangent
Tangent is located near 2 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Tangent
| System Name | PWSID | Population | Source |
|---|---|---|---|
| LAKE CREEK RANCH MHC | OR4101429 | 300 | GW |
| LONE OAK ESTATES | OR4101470 | 258 | GW |
| MEADOW WOOD ESTATES | OR4106166 | 60 | GW |
| HARMONY ACRES MOBILE PARK | OR4100810 | 31 | GW |
How Tangent compares
Full Oregon rankings →Tangent's score of 60/100 is above the average of 42/100 among major Oregon cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Oregon rankings →About Tangent, OR
Learn more about your water
Guides and resources related to Tangent's water quality findings.
Explore water quality across Linn
Frequently asked questions
Is Tangent, OR tap water safe to drink?
Tangent's water quality earned a grade of C (60/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #108 out of 213 cities tested in Oregon.
What contaminants are in Tangent's water?
Lead was measured at 0.0 ppb (90th percentile). 352 violations are on record.
How is Tangent's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Tangent?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Tangent's water come from?
Tangent's water is sourced from Groundwater. The city has 4 water systems serving approximately 649 residents.
What health violations has Tangent's water system had?
Tangent has 7 health-based violations on record. The most recent violation was recorded in November 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 24 violations remain unresolved.
Is Tangent's groundwater at risk of contamination?
Tangent uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 352 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Tangent's water compare to other cities?
Tangent ranks #108 out of 213 cities in Oregon (better than 49% of state cities) and #12130 out of 15744 cities nationally (23th percentile). The grade of C reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.