Is Weldon, CA Tap Water Safe to Drink?
Graded D+, with 11 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
52/100
waterverge.com Weldon, CA — Water Quality Report
Weldon's drinking water received a grade of D+ (52 out of 100), indicating poor water quality. The city's 6 water systems serve approximately 1,562 residents using groundwater.
Lead levels were measured at 1.3 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 261 violations on record, including 193 health-based violations. 11 remain unresolved.
What to know about Weldon's water
Weldon ranks #598 out of 694 cities in California for water quality, placing it among the lowest-rated in the state.
Weldon 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, Weldon may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 63 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Weldon, CA water safe to drink?
Weldon's drinking water has significant quality concerns based on EPA testing data. With a grade of D+ (52/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 6 water systems serve approximately 1,562 residents using groundwater (wells).
Recent water quality updates for Weldon
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Weldon's water quality assessment. Grade: D+ (52/100).
2 health-based. Contaminants: Nitrate, Combined Uranium.
2 health-based. Contaminants: Combined Uranium, Nitrate.
3 health-based. Contaminants: Nitrate, Combined Uranium.
Federal disaster declaration (FEMA DR-4750). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3592). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Weldon's water supply.
Well within EPA limits.
Violation history
Weldon's water system has 261 total violations on record, including 193 health-based violations. 11 remain unresolved. 63 violations were issued in the last 5 years.
Flood & environmental risk
Kern County has experienced 10 federally declared disasters since 1967. 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 Weldon's water come from?
Weldon's drinking water comes from groundwater (wells), supplied by 6 water systems serving approximately 1,562 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Weldon residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Weldon'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.
Weldon'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
Flood & disaster history
Kern County has experienced 10 federally declared disasters since 1967. 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. | 1.3 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Weldon compares by contaminant
Explore where Weldon ranks among all California cities for specific contaminants.
Water source & infrastructure
Where Weldon's water comes from
Weldon'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 1,562 people through 6 water systems.
Water systems serving Weldon
| System Name | PWSID | Population | Source |
|---|---|---|---|
| TRADEWIND WATER ASSOC. | CA1500406 | 632 | GW |
| VALLEY ESTATES POA, INC. | CA1500478 | 386 | GW |
| RAINBIRD VALLEY MWC | CA1500393 | 238 | GW |
| BELLA VISTA MUTUAL WATER COMPANY | CA1502653 | 150 | GW |
| LAKEVIEW RANCHOS MUTUAL WATER COMPANY | CA1500525 | 120 | GW |
| HILLVIEW ACRES MUTUAL WATER COMPANY | CA1500448 | 36 | GW |
How Weldon compares
Full California rankings →Weldon's score of 52/100 is on par with the average of 57/100 among major California cities. It outscores 5 of 10 nearby cities.
Nearby cities
View California rankings →About Weldon, CA
Wikipedia →Weldon is a census-designated place (CDP) in Kern County, California, United States. It sits at the southeast tip of Lake Isabella. Weldon is located 9 miles (14 km) east-southeast of Wofford Heights, at an elevation of 2,654 feet (809 m). The population was 2,303 at the 2020 census, down from 2,642 at the 2010 census.
Learn more about your water
Guides and resources related to Weldon's water quality findings.
Explore water quality across Kern
Frequently asked questions
Is Weldon, CA tap water safe to drink?
Weldon's water quality earned a grade of D+ (52/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #598 out of 694 cities tested in California.
What contaminants are in Weldon's water?
Lead was measured at 1.3 ppb (90th percentile). 261 violations are on record.
How is Weldon'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 Weldon?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Weldon's water come from?
Weldon's water is sourced from Groundwater. The city has 6 water systems serving approximately 1,562 residents.
What health violations has Weldon's water system had?
Weldon has 193 health-based violations on record. The most recent violation was recorded in October 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 11 violations remain unresolved.
Is Weldon's groundwater at risk of contamination?
Weldon 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 261 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 Weldon's water compare to other cities?
Weldon ranks #598 out of 694 cities in California (better than 14% of state cities) and #12818 out of 15744 cities nationally (19th percentile). The grade of D+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.