Is Esparto, CA 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 ↓
90.7/100
waterverge.com Esparto, CA — Water Quality Report
Esparto's drinking water received a grade of A (90.7 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 3,574 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 8 violations on record, including 4 health-based violations. 2 remain unresolved.
What to know about Esparto's water
Esparto ranks #122 out of 694 cities in California for water quality, placing it above average in the state.
Esparto 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.
Water quality score
See methodology →Is Esparto, CA water safe to drink?
Esparto's tap water meets most EPA standards but has areas that warrant attention. With a grade of A (90.7/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 3,574 residents using groundwater (wells).
Recent water quality updates for Esparto
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Esparto's water quality assessment. Grade: A (90.7/100).
Federal disaster declaration (FEMA DR-4683). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3591). Flood event — may have impacted local water infrastructure.
Contaminants: Lead and Copper Rule.
Contaminants: Coliform (TCR).
1 health-based. Contaminants: Coliform (TCR).
Key contaminant findings
Based on the most recent EPA sampling data for Esparto's water supply.
Well within EPA limits.
Violation history
Esparto's water system has 8 total violations on record, including 4 health-based violations. 2 remain unresolved.
Flood & environmental risk
Yolo County has experienced 8 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.
Where does Esparto's water come from?
Esparto's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 3,574 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Esparto 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.
Esparto'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 Esparto
Industrial polluters nearby
Reported releases to surface water by facilities near Esparto, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
WOODLAND PLANT WOODLAND, CA95695 | — | — | 8.5 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Yolo County has experienced 8 federally declared disasters since 1964. 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 Esparto compares by contaminant
Explore where Esparto ranks among all California cities for specific contaminants.
Water source & infrastructure
Where Esparto's water comes from
Esparto'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 3,574 people through 1 water system.
Water systems serving Esparto
| System Name | PWSID | Population | Source |
|---|---|---|---|
| ESPARTO C.S.D. | CA5710007 | 3,574 | GW |
How Esparto compares
Full California rankings →Esparto's score of 90.7/100 is above the average of 57/100 among major California cities. It outscores 9 of 10 nearby cities.
Nearby cities
View California rankings →About Esparto, CA
Learn more about your water
Guides and resources related to Esparto's water quality findings.
Explore water quality across Yolo
Frequently asked questions
Is Esparto, CA tap water safe to drink?
Esparto's water quality earned a grade of A (90.7/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #122 out of 694 cities tested in California.
What contaminants are in Esparto's water?
Lead was measured at 0.0 ppb (90th percentile). 8 violations are on record.
How is Esparto'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 Esparto?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Esparto's water come from?
Esparto's water is sourced from Groundwater. The city has 1 water system serving approximately 3,574 residents.
What health violations has Esparto's water system had?
Esparto has 4 health-based violations on record. The most recent violation was recorded in October 2019. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 2 violations remain unresolved.
Is Esparto's groundwater at risk of contamination?
Esparto 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 8 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 Esparto's water compare to other cities?
Esparto ranks #122 out of 694 cities in California (better than 82% of state cities) and #2072 out of 15744 cities nationally (87th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.