F0/100
Coarsegold Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 5,300 residents · California
What's In Coarsegold's Tap Water?
38
Contaminants Tested
2
Exceed EPA Limits
1
Above EPA Goals
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.008 µg/L | 0.004 µg/L | Over Limit |
PFOA | 0.007 µg/L | 0.004 µg/L | Over Limit |
Lead (90th percentile) | 0.008 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
12
Violations (last 5yr)
2
Unresolved
7
Health-Related
TIER 3Unresolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 2Unresolved
Treatment technique violation
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2022 – December 31, 2022Enforcement: Formal — state order issued
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2022 – September 30, 2022Enforcement: Formal — state order issued
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: April 1, 2022 – June 30, 2022Enforcement: Formal — state order issued
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2022 – March 31, 2022Enforcement: Formal — state order issued
TIER 3Resolved
Other violation
When: October 1, 2021 – December 31, 2021Enforcement: Formal — state order issued
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2021 – December 31, 2021Enforcement: Formal — state order issued
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2021Enforcement: Formal — state order issued
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2021Enforcement: Formal — state order issued
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2021 – September 30, 2021Enforcement: Formal — state order issued
TIER 3Resolved
Other violation
When: July 1, 2021 – September 30, 2021Enforcement: Formal — state order issued
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
YOSEMITE SPRING PARK UTIL CO
Population Served
5,300
Water Source
Groundwater
System ID
CA2010005
Frequently Asked Questions About Coarsegold Water
Is Coarsegold tap water safe to drink?
Coarsegold, California tap water receives a grade of F (0/100), which is considered failing. 2 contaminant(s) exceed EPA maximum contaminant levels and 40 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Coarsegold's water?
Of the 38 contaminants tested in Coarsegold's water supply, the most notable include PFOS, PFOA, Lead (90th percentile). 2 contaminant(s) exceed EPA legal limits (MCLs). 3 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Coarsegold have any water quality violations?
Yes, Coarsegold has 40 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, MCL. 22 of these are health-based violations, which are the most serious category.
Do I need a water filter in Coarsegold?
Based on EPA data, using a water filter in Coarsegold is recommended. 2 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Coarsegold's tap water come from?
Coarsegold's drinking water is sourced from groundwater and supplied by YOSEMITE SPRING PARK UTIL CO. The system serves approximately 5,300 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Coarsegold'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. Coarsegold'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 Coarsegold's water compare to other cities in California?
Coarsegold's water quality score of 0/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our California state page to see how all cities in the state compare.
What should I do if I'm concerned about Coarsegold's water quality?
If you have concerns about Coarsegold'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 (YOSEMITE SPRING PARK UTIL CO) 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.