Is Etna, 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 ↓
89.9/100
waterverge.com Etna, CA — Water Quality Report
Etna's drinking water received a grade of A- (89.9 out of 100), indicating good water quality. The city's 1 water system serves approximately 720 residents using surface water.
Lead levels were measured at 1.9 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 7 violations on record, including 2 health-based violations. 2 remain unresolved.
What to know about Etna's water
Etna ranks #144 out of 694 cities in California for water quality, placing it above average in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
As a small community water system, Etna may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Etna, CA water safe to drink?
Etna's tap water meets most EPA standards but has areas that warrant attention. With a grade of A- (89.9/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 720 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Etna
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Etna's water quality assessment. Grade: A- (89.9/100).
Federal disaster declaration (FEMA DR-4750). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4683). Flood event — may have impacted local water infrastructure.
Contaminants: Revised Total Coliform Rule.
Contaminants: Consumer Confidence Rule.
1 health-based. Contaminants: Coliform (TCR).
Key contaminant findings
Based on the most recent EPA sampling data for Etna's water supply.
Well within EPA limits.
Violation history
Etna's water system has 7 total violations on record, including 2 health-based violations. 2 remain unresolved.
Flood & environmental risk
Siskiyou 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 Etna's water come from?
Etna's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 1 water system serving approximately 720 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment.
What Etna 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.
Etna'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
Drought conditions
D1 — moderate droughtSiskiyou County is currently in D1 (moderate drought) per the U.S. Drought Monitor (week of May 5, 2026). 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
Siskiyou 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. | 1.9 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Etna compares by contaminant
Explore where Etna ranks among all California cities for specific contaminants.
Water source & infrastructure
Where Etna's water comes from
Etna's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by local government ownership and serves approximately 720 people through 1 water system.
Water systems serving Etna
| System Name | PWSID | Population | Source |
|---|---|---|---|
| ETNA, CITY OF | CA4710004 | 720 | SW |
How Etna compares
Full California rankings →Etna's score of 89.9/100 is above the average of 57/100 among major California cities. It outscores 9 of 10 nearby cities.
Nearby cities
View California rankings →About Etna, CA
Wikipedia →Etna is a town in the Scott Valley area of Siskiyou County, California, United States. Its population is 678 as of the 2020 census, down from 737 from the 2010 census.
Learn more about your water
Guides and resources related to Etna's water quality findings.
Explore water quality across Siskiyou
Frequently asked questions
Is Etna, CA tap water safe to drink?
Etna's water quality earned a grade of A- (89.9/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #144 out of 694 cities tested in California.
What contaminants are in Etna's water?
Lead was measured at 1.9 ppb (90th percentile). 7 violations are on record.
How is Etna'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 Etna?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Etna's water come from?
Etna's water is sourced from Surface water. The city has 1 water system serving approximately 720 residents.
What health violations has Etna's water system had?
Etna has 2 health-based violations on record. The most recent violation was recorded in March 2020. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 2 violations remain unresolved.
How does Etna's water compare to other cities?
Etna ranks #144 out of 694 cities in California (better than 79% of state cities) and #2528 out of 15744 cities nationally (84th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Etna's small water system affect quality?
Etna's system serves approximately 720 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 7 violations on record.