B61/100
Rock Hill Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 82,846 residents · South Carolina
What's In Rock Hill'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) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2013.
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
ROCK HILL CITY OF (SC4610002)
Population Served
82,846
Water Source
Surface Water
System ID
SC4610002
Frequently Asked Questions About Rock Hill Water
Is Rock Hill tap water safe to drink?
Rock Hill, South Carolina tap water receives a grade of B (61/100), which is considered good. 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 Rock Hill's water?
Of the 69 contaminants tested in Rock Hill'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 Rock Hill have any water quality violations?
Yes, Rock Hill has 16 EPA violation(s) on record, with the most recent in 2013. Violation types include MR, MCL, TT. 5 of these are health-based violations, which are the most serious category.
Do I need a water filter in Rock Hill?
Rock Hill 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 Rock Hill's tap water come from?
Rock Hill's drinking water is sourced from surface water and supplied by ROCK HILL CITY OF (SC4610002). The system serves approximately 82,846 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Rock Hill'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. Rock Hill'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 Rock Hill's water compare to other cities in South Carolina?
Rock Hill's water quality score of 61/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our South Carolina state page to see how all cities in the state compare.
What should I do if I'm concerned about Rock Hill's water quality?
If you have concerns about Rock Hill'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 (ROCK HILL CITY OF (SC4610002)) 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.