Is Greenleaf, ID Tap Water Safe to Drink?
Graded A, with 2 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
92.9/100
waterverge.com Greenleaf, ID — Water Quality Report
Greenleaf's drinking water received a grade of A (92.9 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 846 residents using groundwater.
Lead levels were measured at 2.0 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 44 violations on record, including 4 health-based violations. 2 remain unresolved.
What to know about Greenleaf's water
Greenleaf ranks #11 out of 139 cities in Idaho for water quality, placing it one of the best in the state.
Greenleaf 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, Greenleaf may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Greenleaf, ID water safe to drink?
Greenleaf's tap water meets most EPA standards but has areas that warrant attention. With a grade of A (92.9/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 846 residents using groundwater (wells).
Recent water quality updates for Greenleaf
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Greenleaf's water quality assessment. Grade: A (92.9/100).
Contaminants: Revised Total Coliform Rule.
Contaminants: Nitrate.
Federal disaster declaration (FEMA DR-4342). Flood event — may have impacted local water infrastructure.
Contaminants: Lead and Copper Rule.
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 Greenleaf's water supply.
Well within EPA limits.
Violation history
Greenleaf's water system has 44 total violations on record, including 4 health-based violations. 2 remain unresolved. 1 violation was issued in the last 5 years.
Flood & environmental risk
Canyon 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 W Hartley Gulch Nr Caldwell, East Hartley, Boise River, Conway Gulch Below 1St, Dixie Drain Nr Wilder.
Where does Greenleaf's water come from?
Greenleaf's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 846 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include W Hartley Gulch Nr Caldwell (river), East Hartley (river), Boise River (river), Conway Gulch Below 1St (river), Dixie Drain Nr Wilder (river).
What Greenleaf residents can do
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 Greenleaf
Industrial polluters nearby
Reported releases to surface water by facilities near Greenleaf, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
FORTERRA STRUCTURAL SPECIALTY PRODUCTS - CALDWELL CALDWELL, ID83607 | — | — | 1.6 mi |
SIMPLOT WESTERN STOCKMEN'S CALDWELL, ID83605 | — | — | 5.8 mi |
DARIGOLD-CALDWELL CALDWELL, ID83605 | — | — | 6.6 mi |
SIMPLOT U.S. FOOD GROUP HOLDINGS LLC CALDWELL, ID83605 | — | — | 7.3 mi |
BEST BATH SYSTEMS CALDWELL, ID83605 | — | — | 5.7 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Canyon 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. | 2.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Greenleaf compares by contaminant
Explore where Greenleaf ranks among all Idaho cities for specific contaminants.
Water source & infrastructure
Where Greenleaf's water comes from
Greenleaf'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 846 people through 1 water system.
Water bodies near Greenleaf
Greenleaf is located near 5 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Greenleaf
| System Name | PWSID | Population | Source |
|---|---|---|---|
| GREENLEAF CITY OF | ID3140041 | 846 | GW |
How Greenleaf compares
Full Idaho rankings →Greenleaf's score of 92.9/100 is above the average of 43/100 among major Idaho cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Idaho rankings →About Greenleaf, ID
Wikipedia →Greenleaf is a city in Canyon County, Idaho, United States. The population was 812 at the 2020 census. Greenleaf is part of the Boise-Nampa metropolitan area. The town was established by Quakers in the early-1900s and is named after Quaker poet and abolitionist John Greenleaf Whittier.
Learn more about your water
Guides and resources related to Greenleaf's water quality findings.
Explore water quality across Canyon
Frequently asked questions
Is Greenleaf, ID tap water safe to drink?
Greenleaf's water quality earned a grade of A (92.9/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #11 out of 139 cities tested in Idaho.
What contaminants are in Greenleaf's water?
Lead was measured at 2.0 ppb (90th percentile). 44 violations are on record.
How is Greenleaf'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 Greenleaf?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Greenleaf's water come from?
Greenleaf's water is sourced from Groundwater. The city has 1 water system serving approximately 846 residents.
What health violations has Greenleaf's water system had?
Greenleaf has 4 health-based violations on record. The most recent violation was recorded in August 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 2 violations remain unresolved.
Is Greenleaf's groundwater at risk of contamination?
Greenleaf 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 44 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 Greenleaf's water compare to other cities?
Greenleaf ranks #11 out of 139 cities in Idaho (better than 92% of state cities) and #1070 out of 15744 cities nationally (93th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Greenleaf's small water system affect quality?
Greenleaf's system serves approximately 846 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 44 violations on record.