North Charleston, South Carolina
Water Filtration Systems in North Charleston
The same water as Charleston — and most of the remaining lead service lines.
The same water as Charleston — and most of the remaining lead service lines.
Quick answer: North Charleston is served by Charleston Water System — the same soft, chloraminated surface water as the peninsula, with PFOA and PFOS above EPA’s new limits. The Neck area also holds a large share of the roughly 6,000 lead service lines the utility is still replacing. Call (843) 718-8177.
North Charleston shares Charleston’s water and Charleston’s numbers. What is different here is the distribution side.
| Measure | Published figure | Source |
|---|---|---|
| Hardness | 58.4 ppm · 3.4 grains — “moderately soft” | Charleston Water System FAQ · 2026 |
| Source water | 90% Bushy Park Reservoir, 10% Edisto River | Charleston Water System FAQ · 2026 |
| Disinfectant | Chlorine dioxide and chloramines | Charleston Water System FAQ · 2026 |
| PFOA / PFOS | 4.3 / 5.8 ppt — both above the 4.0 limit | EPA UCMR5 occurrence data · 2026-08 |
| Total trihalomethanes | 12 ppb against an 80 ppb limit | CWS 2026 Water Quality Report · 2026 |
| Lead, 90th percentile | 3.5 ppb against a 15 ppb action level | CWS 2026 Water Quality Report · 2026 |
Every figure above is published by Charleston Water System or by EPA. None of it is our measurement, and all of it is checkable.
The utility calls its own water moderately soft and publishes 3.4 grains per gallon. National softener retailers advertise Charleston at 8.5 to 10.2 grains. There is very little hardness here to remove.
Because the disinfectant is chloramine rather than free chlorine, ordinary carbon needs about ten minutes of contact time to strip it and catalytic carbon needs three to four. Most systems sold here are sized for neither.
PFOA and PFOS both measured above the new federal limits. Those limits are not enforceable until April 2029, so the utility is not in violation — but an under-sink reverse osmosis unit addresses it now for a few hundred dollars.
Charleston Water System names the Neck area of North Charleston as one of two places its remaining lead service lines are concentrated. It notified 70,000 customers in November 2024 and has state and federal funding to remove about 1,100 of them, with a ten-year programme behind that.
The utility’s own lead result is 3.5 ppb at the 90th percentile against a 15 ppb action level, and corrosion control has run since 1992. A certified point-of-use filter at the kitchen tap is a sensible interim step for an affected address.
Permits in North Charleston go through City of North Charleston; the licensed plumbing subcontractor pulls it in their own name.
Charleston Water System has roughly 6,000 lead service lines remaining, and names the Neck area of North Charleston as one of the two areas where they are concentrated.
It notified 70,000 customers in November 2024. The utility’s 90th-percentile lead result is 3.5 ppb against a 15 ppb action level, and it has run corrosion control since 1992. Check your own address with the utility.
No. It is Charleston Water System water — 58.4 ppm, 3.4 grains, which the utility calls moderately soft.
A softener has very little to do on this supply. If someone is selling you one for North Charleston, ask them what hardness figure they are working from and where it came from.
An under-sink reverse osmosis unit covers PFAS and, if your service line is one of the affected ones, lead at the tap.
A whole-house catalytic carbon system handles the chloramine taste and smell for the rest of the house. Those are two different jobs and two different boxes.