01The verdict: is Point Mugu water safe?
Point Mugu's drinking water has significant quality concerns based on EPA testing data. With a grade of A- (85.5/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 3 water systems serve approximately 14,579 residents using surface water (rivers, lakes, or reservoirs).
Copper is over its legal limit
Measured at 1.40 mg/L against the EPA Action Level of 1.3 mg/L. The ledger below shows how far over — and which filter removes it.
See the measurement ↓Lead is well under the limit
90th-percentile lead is 0.0 ppb — beneath the 15 ppb federal action level and under the 5 ppb watch threshold.
See the trend ↓3 violations in the last five years
Recent compliance history is the best predictor of future problems — the year-by-year record is below.
See the record ↓Point Mugu's drinking water received a grade of A- (85.5 out of 100), indicating good water quality. The city's 3 water systems serve approximately 14,579 residents using purchased surface water.
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 26 violations on record, including 11 health-based violations. 3 remain unresolved.
Point Mugu ranks #257 out of 690 cities in California for water quality, placing it mid-range 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. Hexavalent chromium (chromium-6) was detected at 0.25 µg/L in UCMR 3 testing. While below California's 10 µg/L limit and with no federal MCL set, residents sensitive to this contaminant may consider reverse osmosis filtration.
02What's in Point Mugu's water
Every contaminant flagged in Point Mugu, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
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 |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 1.40 | 1.3 | mg/L | Inorganic | Over Limit |
Cities ranked by 90th-percentile lead PF PFAS in California
Cities ranked by compounds detected Cu Copper in California
Cities ranked by 90th-percentile copper
03Point Mugu's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 26 violations on record, including 11 health-based violations. 3 remain unresolved.
7 of the last ten years were clean. The numbered years had EPA violations — red when any were health-based, amber when they were paperwork or missed-testing issues.
▼ Down 53 ppb since 1992. Latest reading: 0 ppb (2025) — 0% of the action level. Sampled at higher-risk homes (90th percentile).
1.6mg/L(1996)
One sampling round on record — 123% of the 1.3mg/L EPA action level. Sampled at higher-risk homes (90th percentile).
04Where Point Mugu's water comes from
Point Mugu's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Purchased Surface Water
Rivers, lakes, or reservoirs — more exposed to runoff, agriculture, and seasonal swings than groundwater.
Wholesale supplier
Multi-barrier treatment: coagulation, sedimentation, filtration, and disinfection to meet EPA standards.
3 systems
3 water systems, operated under federal ownership.
14,579 people
Residents served across Point Mugu's service area.
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 federal ownership and serves approximately 14,579 people through 3 water systems.
| System name | PWSID | Population | Source |
|---|---|---|---|
| NAVAL BASE VENTURA COUNTY, PORT HUENEME | CA5610701 | 8,625 | Purchased Surface Water |
| NAVAL BASE VENTURA COUNTY, POINT MUGU | CA5610700 | 5,700 | Purchased Surface Water |
| U.S.N., SAN NICOLAS ISLAND | CA5610702 | 254 | Ground Water Under Influence |
05How Point Mugu compares
Scores for nearby California cities on one line, with the average marked.
dashed line = California average (57/100)
Point Mugu scores 85.5/100 — above the California average of 57/100. It outscores 8 of 10 nearby cities. Full California rankings →
42.8 / 100FSan Jose, CA
28 / 100BOakland, CA
77.9 / 100FSan Diego, CA
39.7 / 100FSacramento, CA
31.2 / 100ABurlingame, CA
89.2 / 100
Compare all cities in the county — grades, violations, and contaminant data side by side.→
06What to do at home
Steps matched to what testing actually found in Point Mugu's water — not generic advice.
Filter drinking & cooking water
NSF-certified water filter. Copper exceeds the EPA action level of 1.3 mg/L
Compare tested filters →Read your utility's annual report
Every utility must publish a yearly Consumer Confidence Report with its own testing results. It pairs well with the independent data on this page.
How to read a CCR →Watch for Point Mugu alerts
We refresh EPA data monthly and surface new violations, advisories, and boil-water notices for your county on this page.
All water alerts →Frequently asked questions
Is Point Mugu, CA tap water safe to drink?
Point Mugu's water quality earned a grade of A- (85.5/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #257 out of 690 cities tested in California.
What contaminants are in Point Mugu's water?
Lead was measured at 0.0 ppb (90th percentile). 26 violations are on record.
How is Point Mugu'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 Point Mugu?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Point Mugu's water come from?
Point Mugu's water is sourced from Purchased surface water. The city has 3 water systems serving approximately 14,579 residents.
What health violations has Point Mugu's water system had?
Point Mugu has 11 health-based violations on record. The most recent violation was recorded in July 2023. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 3 violations remain unresolved.
How does Point Mugu's water compare to other cities?
Point Mugu ranks #257 out of 690 cities in California (better than 63% of state cities) and #5223 out of 15382 cities nationally (66th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.