Is Del Rey, CA Tap Water Safe to Drink?
Graded A+ with no contaminants above EPA limits. Here's everything we tested and how Del Rey ranks. What to do next ↓
96.3/100
waterverge.com Del Rey, CA — Water Quality Report
Del Rey's drinking water received a grade of A+ (96.3 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 1,491 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 10 violations on record, including 2 health-based violations. All violations have been resolved.
What to know about Del Rey's water
Del Rey ranks #27 out of 694 cities in California for water quality, placing it one of the best in the state.
Del Rey 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, Del Rey may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Del Rey, CA water safe to drink?
Based on EPA testing data, Del Rey's tap water is generally safe to drink. The water system earned a grade of A+ (96.3/100), meeting federal drinking water standards across key contaminant categories. The city's 1 water system serves approximately 1,491 residents using groundwater (wells).
Recent water quality updates for Del Rey
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Del Rey's water quality assessment. Grade: A+ (96.3/100).
Federal disaster declaration (FEMA DR-3592). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4683). Flood event — may have impacted local water infrastructure.
Contaminants: Coliform (TCR).
Contaminants: Coliform (TCR).
Contaminants: Coliform (TCR).
Key contaminant findings
Based on the most recent EPA sampling data for Del Rey's water supply.
Well within EPA limits.
Violation history
Del Rey's water system has 10 total violations on record, including 2 health-based violations. All violations have been resolved.
Flood & environmental risk
Los Angeles County has experienced 10 federally declared disasters since 1980. 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 Del Rey's water come from?
Del Rey's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,491 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Del Rey 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.
Del Rey'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 Del Rey
Industrial polluters nearby
Reported releases to surface water by facilities near Del Rey, ranked by pounds discharged annually.
Total reported releases to surface water: 0 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
BASALITE CONCRETE PRODUCTS SELMA, CA93662 | Lead | 0 | 6.6 mi |
POM WONDERFUL DEL REY, CA93616 | — | — | 0.4 mi |
GUARDIAN INDUSTRIES LLC KINGSBURG, CA93631 | — | — | 7.6 mi |
FRESNO VALVES & CASTINGS INC. SELMA, CA93662 | — | — | 4.9 mi |
CEMEX FRESNO PLANT FRESNO, CA93725 | — | — | 7.9 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Del Rey
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.
- SELMA PRESSURE TREATING COMPANY6.9 mi
- PURITY OIL SALES INC8.5 mi
Source: EPA Superfund National Priorities List
Flood & disaster history
Los Angeles County has experienced 10 federally declared disasters since 1980. 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 Del Rey compares by contaminant
Explore where Del Rey ranks among all California cities for specific contaminants.
Water source & infrastructure
Where Del Rey's water comes from
Del Rey'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 1,491 people through 1 water system.
Water systems serving Del Rey
| System Name | PWSID | Population | Source |
|---|---|---|---|
| DEL REY COMMUNITY SERV DIST | CA1010035 | 1,491 | GW |
How Del Rey compares
Full California rankings →Del Rey's score of 96.3/100 is above the average of 57/100 among major California cities. It outscores 10 of 10 nearby cities.
Nearby cities
View California rankings →About Del Rey, CA
Learn more about your water
Guides and resources related to Del Rey's water quality findings.
Explore water quality across Fresno
Frequently asked questions
Is Del Rey, CA tap water safe to drink?
Del Rey's water quality earned a grade of A+ (96.3/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #27 out of 694 cities tested in California.
What contaminants are in Del Rey's water?
Lead was measured at 0.0 ppb (90th percentile). 10 violations are on record.
How is Del Rey'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 Del Rey?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Del Rey's water come from?
Del Rey's water is sourced from Groundwater. The city has 1 water system serving approximately 1,491 residents.
What health violations has Del Rey's water system had?
Del Rey has 2 health-based violations on record. The most recent violation was recorded in July 2015. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. All health violations have been resolved.
Is Del Rey's groundwater at risk of contamination?
Del Rey 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 10 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 Del Rey's water compare to other cities?
Del Rey ranks #27 out of 694 cities in California (better than 96% of state cities) and #197 out of 15744 cities nationally (99th percentile). The grade of A+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Del Rey's small water system affect quality?
Del Rey's system serves approximately 1,491 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 10 violations on record.