Is Hansen, ID Tap Water Safe to Drink?
Graded B, with 5 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
77.1/100
waterverge.com Hansen, ID — Water Quality Report
Hansen's drinking water received a grade of B (77.1 out of 100), indicating good water quality. The city's 2 water systems serve approximately 1,350 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 11 violations on record, including 4 health-based violations. 5 remain unresolved.
What to know about Hansen's water
Hansen ranks #60 out of 139 cities in Idaho for water quality, placing it mid-range in the state.
Hansen 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, Hansen may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Hansen, ID water safe to drink?
Hansen's drinking water has significant quality concerns based on EPA testing data. With a grade of B (77.1/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 1,350 residents using groundwater (wells).
Recent water quality updates for Hansen
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Hansen's water quality assessment. Grade: B (77.1/100).
Contaminants: Lead and Copper Rule.
Contaminants: Public Notice.
1 health-based. Contaminants: Groundwater Rule.
Federal disaster declaration (FEMA DR-4310). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3244). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Hansen's water supply.
Well within EPA limits.
Violation history
Hansen's water system has 11 total violations on record, including 4 health-based violations. 5 remain unresolved. 4 violations were issued in the last 5 years.
Flood & environmental risk
Twin Falls County has experienced 2 federally declared disasters since 2005. 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 Devils Washbowl Spring Nr Kimberly 10S 18E 04Aad1S, Snake River Nr Kimberly.
Where does Hansen's water come from?
Hansen's drinking water comes from groundwater (wells), supplied by 2 water systems serving approximately 1,350 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Devils Washbowl Spring Nr Kimberly 10S 18E 04Aad1S (river), Snake River Nr Kimberly (river).
What Hansen residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Hansen'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.
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 Hansen
Industrial polluters nearby
Reported releases to surface water by facilities near Hansen, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
LAMB WESTON INC TWIN FALLS, ID83301 | — | — | 9.3 mi |
AMALGAMATED SUGAR CO TWIN FALLS, ID83301 | — | — | 6.8 mi |
GLANBIA FOODS INC TWIN FALLS, ID83301 | — | — | 9.1 mi |
CHOBANI IDAHO TWIN FALLS, ID83301 | — | — | 6.9 mi |
LIPPERT COMPONENTS - TWIN FALLS #64 TWIN FALLS, ID83301 | — | — | 6.2 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D4 — exceptional droughtTwin Falls County is currently in D4 (exceptional drought) per the U.S. Drought Monitor (week of May 5, 2026). 26.4% of the county is in D4 (exceptional) drought. 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
Twin Falls County has experienced 2 federally declared disasters since 2005. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
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 |
Lead level trend (90th percentile)
See how Hansen compares by contaminant
Explore where Hansen ranks among all Idaho cities for specific contaminants.
Water source & infrastructure
Where Hansen's water comes from
Hansen'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 local government ownership and serves approximately 1,350 people through 2 water systems.
Water bodies near Hansen
Hansen is located near 2 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Hansen
| System Name | PWSID | Population | Source |
|---|---|---|---|
| HANSEN CITY OF | ID5420027 | 1,200 | GW |
| ROCK LEDGE ESTATES | ID5420107 | 150 | GW |
How Hansen compares
Full Idaho rankings →Hansen's score of 77.1/100 is above the average of 43/100 among major Idaho cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Idaho rankings →About Hansen, ID
Wikipedia →Hansen is a city in Twin Falls County, Idaho, United States. The population was 1,086 at the 2020 census, and 1,144 at the 2010 census. It is part of the Twin Falls, Idaho Micropolitan Statistical Area.
Learn more about your water
Guides and resources related to Hansen's water quality findings.
Explore water quality across Twin Falls
Frequently asked questions
Is Hansen, ID tap water safe to drink?
Hansen's water quality earned a grade of B (77.1/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #60 out of 139 cities tested in Idaho.
What contaminants are in Hansen's water?
Lead was measured at 0.0 ppb (90th percentile). 11 violations are on record.
How is Hansen'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 Hansen?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Hansen's water come from?
Hansen's water is sourced from Groundwater. The city has 2 water systems serving approximately 1,350 residents.
What health violations has Hansen's water system had?
Hansen has 4 health-based violations on record. The most recent violation was recorded in December 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 5 violations remain unresolved.
Is Hansen's groundwater at risk of contamination?
Hansen 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 11 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 Hansen's water compare to other cities?
Hansen ranks #60 out of 139 cities in Idaho (better than 57% of state cities) and #9108 out of 15744 cities nationally (42th percentile). The grade of B reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.