A91/100
Shasta Lake Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 10,657 residents · California
What's In Shasta Lake's Tap Water?
69
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1993.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
CITY OF SHASTA LAKE
Population Served
10,657
Water Source
Surface Water
System ID
CA4510006
Frequently Asked Questions About Shasta Lake Water
Is Shasta Lake tap water safe to drink?
Shasta Lake, California tap water receives a grade of A (91/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 1 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Shasta Lake's water?
Of the 69 contaminants tested in Shasta Lake's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Shasta Lake have any water quality violations?
Yes, Shasta Lake has 2 EPA violation(s) on record, with the most recent in 1993. Violation types include MR, TT. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in Shasta Lake?
Shasta Lake water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does Shasta Lake's tap water come from?
Shasta Lake's drinking water is sourced from surface water and supplied by CITY OF SHASTA LAKE. The system serves approximately 10,657 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Shasta Lake's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Shasta Lake's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Shasta Lake's water compare to other cities in California?
Shasta Lake's water quality score of 91/100 earns a grade of A, which is considered excellent. This places Shasta Lake among the better-performing water systems in California. Visit our California state page to see how all cities in the state compare.
What should I do if I'm concerned about Shasta Lake's water quality?
If you have concerns about Shasta Lake's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (CITY OF SHASTA LAKE) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.