Mount Pleasant, SC: 3 Health Violations — 82/100 (2026)
3 ZIP codes · 3 water systems · Updated 2026-06-03
Residents of Mount Pleasant generally live with tap water that beats the SC safety average on key EPA compliance metrics.
How Mount Pleasant Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Mount Pleasant Water
- Your city's water systems recorded 18 violations in the past 5 years.
- Average lead level: 0.0011 mg/L.
- Homes built before 1986: 23% — older plumbing may contain lead solder.
- Estimated remediation: $2,100 per household.
- CDC health risk index: 11.36.
Who Supplies Your Water in Mount Pleasant
Water delivery in Mount Pleasant, SC is handled by 3 utilities rather than a single system — drawn from 3 providers in federal records, each filing its own compliance reports and setting its own rates.
Overview
We track water quality and home safety data for 3 ZIP codes in Mount Pleasant, South Carolina, covering 3 community water systems serving approximately 96,145 people.
3 of 3 ZIP codes (100%) have recorded EPA violations. 3 health-based violations documented.
Home Safety Score
Average Home Safety Score for Mount Pleasant: B (82/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Mount Pleasant water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0011 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 3 ZIP codes
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Technique | 8 | 3 |
| Stage 2 DBP Rule | Treatment Technique | 8 | 3 |
| Surface Water Treatment Rule | Treatment Technique | 8 | 3 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 29464 | B | 6 | 1 | Mt Pleasant Water Works (1010002) |
| 29465 | A | 6 | 1 | Mt Pleasant Water Works (1010002) |
| 29466 | B | 6 | 1 | Mt Pleasant Water Works (1010002) |
All ZIP Codes in Mount Pleasant
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Health Outcomes in Mount Pleasant
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Top Contaminants in Mount Pleasant Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Mount Pleasant
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Compared to many older metro areas, Mount Pleasant carries a relatively newer housing profile — the median build year of 2001 places most of the stock in the post-1986 era when lead solder was federally banned from new plumbing. That shift meaningfully reduces the baseline likelihood of lead leaching from copper joint solder. Homes from before 1986 do still exist in the mix, however, and individual testing remains the only way to confirm what a specific tap actually delivers.
Most homes in Mount Pleasant were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Mount Pleasant Homeowners
Because property values in Mount Pleasant comfortably exceed estimated remediation costs, the equity impact here is proportionally small.
Remediation costs in Mount Pleasant are relatively low compared to home values. The $1,350–$3,200 estimated range is a small fraction of median property value. Home values are 226% above the South Carolina average.
Lead Exposure Risk for Children in Mount Pleasant
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Reading Mount Pleasant's aggregate samples next to its housing-age figures yields a quiet baseline. Lead rests under the federal action benchmark in citywide monitoring, and only 23% of homes were built before the federal ban on solder containing lead. Households with kids — the population for whom CDC guidance places particular weight on minimizing exposure — can confirm in-home conditions with a draw-test kit, with a certified lead-removal filter available through certified retail channels if results warrant it.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Mount Pleasant
Flood exposure in Mount Pleasant is substantial — 1994 NFIP claims on record and 100% of ZIP codes within FEMA-designated zones. That volume of documented flood activity places water-quality implications of flooding firmly in the active-risk category rather than the hypothetical.
Mount Pleasant has a significant flood history with 1,994 FEMA flood insurance claims on record, averaging $10,175 per claim. With 100% of ZIP codes in FEMA-designated flood zones, flood risk is a major concern for homeowners and water quality.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$2,100</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Mount Pleasant, SC