Summerville -- Carnes Crossroads
Carnes Crossroads is a conservation community on Summerville CPW. Newer construction with garage-accessible water mains makes installation straightforward.
Your utility
Carnes Crossroads homes are served by Summerville CPW, which sources water from Lake Moultrie via Santee Cooper. Published hardness ranges from 5.5 to 7.2 grains per gallon, classified as moderately hard. Five PFAS compounds have been detected, with PFUnA at 1,183 times the EWG health advisory level.
Source: Summerville CPW Consumer Confidence Report, EWG Tap Water Database
Water utility
Summerville CPW
Source: Lake Moultrie via Santee Cooper
Hardness
5.5-7.2 gpg (moderately hard)
Disinfectant
Chloramine
Municipality
Summerville (Berkeley County)
PFAS status
PFUnA at 1,183x EWG level
Five PFAS compounds detected in Summerville CPW water serving Carnes Crossroads. PFUnA measured at 1,183 times the EWG health advisory level. CPW has begun a $96 million remediation project with completion targeted for 2029 to 2031.
The forever-chemicals data
Five PFAS compounds detected in Summerville CPW water serving Carnes Crossroads. PFUnA measured at 1,183 times the EWG health advisory level. CPW has begun a $96 million remediation project with completion targeted for 2029 to 2031.
| Compound | Status | EWG multiplier |
|---|---|---|
| PFUnA | Detected | 1,183x |
| PFOS | Detected | Above EWG advisory |
| PFOA | Detected | Above EWG advisory |
| PFHxS | Detected | Above EWG advisory |
| PFBS | Detected | Above EWG advisory |
Source: EWG Tap Water Database for Summerville CPW. CPW has begun a $96 million remediation project with completion targeted for 2029 to 2031.
Summerville water utilities, at a glance
Carnes Crossroads sits inside a patchwork of Lowcountry water utilities, each with its own source, hardness and disinfection chemistry. This stylized diagram sketches the footprint -- it is not a legal service-area map. For the definitive line around your address, use the official Summerville CPW, BCWS and CWS boundary maps.
water-quality.json, accessed 2026-04-16.Utility
Source: brandos-workspace/resimulation/research/water-quality.json
Utility
Source: brandos-workspace/resimulation/research/water-quality.json
Utility
Source: brandos-workspace/resimulation/research/water-quality.json
Utility
Source: brandos-workspace/resimulation/research/water-quality.json
Utility
Source: brandos-workspace/resimulation/research/water-quality.json
Utility
Source: brandos-workspace/resimulation/research/water-quality.json
Neighborhood
This neighborhood is on Summerville CPW.
5.5-7.2 gpg moderately hard; 5 PFAS compounds detected.
Visit the Nextonwater page →Source: water-quality.json; lib/neighborhoods.ts
Neighborhood
This neighborhood is on BCWS (Lake Moultrie source).
Same Lake Moultrie source as CPW; chloramine.
Visit the Cane Bay Plantationwater page →Source: water-quality.json; lib/neighborhoods.ts
Neighborhood
This neighborhood is on BCWS (Lake Moultrie source).
BCWS service; shared Lake Moultrie intake with CPW.
Visit the Carnes Crossroadswater page →Source: water-quality.json; lib/neighborhoods.ts
Neighborhood
This neighborhood is on Summerville CPW.
~7.2 gpg moderately hard; chloramine.
Visit the Foxbank Plantationwater page →Source: water-quality.json; lib/neighborhoods.ts
Neighborhood
This neighborhood is on Summerville CPW.
~7.2 gpg; newer construction, accessible shutoffs.
Visit the Cypress Preservewater page →Source: water-quality.json; lib/neighborhoods.ts
Neighborhood
This neighborhood is on Summerville CPW.
Near Joint Base Charleston; ~7.2 gpg.
Visit the Carolina Groveswater page →Source: water-quality.json; lib/neighborhoods.ts
Neighborhood
This neighborhood is on Mount Pleasant Waterworks.
~3.4 gpg moderately soft; chloramine.
Visit the Mount Pleasantwater page →Source: water-quality.json; lib/neighborhoods.ts
Neighborhood
This neighborhood is on Charleston Water System.
~3.4 gpg; chloramine; ~6,000 lead service lines system-wide.
Visit the West Ashleywater page →Source: water-quality.json; lib/neighborhoods.ts
Neighborhood
This neighborhood is on Charleston Water System.
~3.4 gpg; chloramine; newer construction.
Visit the Daniel Islandwater page →Source: water-quality.json; lib/neighborhoods.ts
Neighborhood
This neighborhood is on Charleston Water System.
~3.4 gpg; chloramine; EWG flags 12 contaminants above guidelines.
Visit the James Islandwater page →Source: water-quality.json; lib/neighborhoods.ts
| Utility | Hardness | Disinfection | PFAS / notable | Neighborhoods |
|---|---|---|---|---|
| Rural well water (no public utility) | Varies -- commonly 5-15 gpg plus iron and sulfur | None (homeowner responsibility; UV or chlorination for bacteria) | Not centrally monitored. Iron staining, hydrogen sulfide odor and hardness are the dominant complaints across Berkeley and Dorchester rural households (est. 15,000-25,000 wells). | -- (no tracked neighborhoods) |
| Berkeley County Water & Sanitation (BCWS) | Similar profile to CPW (Lake Moultrie Water Agency member) | Chloramines (typical for Lake Moultrie source utilities) | BCWS draws from the same Lake Moultrie source water as CPW (~7 ppt PFAS at intake vs. 4 ppt EPA MCL). PFAS profile expected to mirror CPW pending treatment. | Cane Bay Plantation, Carnes Crossroads |
| Summerville CPW (SC1810003) | 5.5-7.2 gpg (moderately hard) | Chloramines (secondary disinfectant) | 5 PFAS compounds detected. PFUnA measured at 1,183x the EWG health advisory. $96M regional remediation project underway; completion 2029-2031. | Nexton, Foxbank Plantation, Cypress Preserve, Carolina Groves |
| Dorchester County Water Authority (DCWA) | 7.2 gpg -- same as CPW supply | Chloramines (inherited from CPW) | Same source water as CPW. PFAS profile is inherited -- DCWA does not operate a separate treatment plant. | -- (no tracked neighborhoods) |
| Charleston Water System (CWS) | ~3.4 gpg / 58.4 ppm (moderately soft) | Chloramines | Meets federal standards. ~6,000 lead service lines identified across the system (older peninsular neighborhoods). 12 contaminants flagged above EWG health guidelines. | West Ashley, Daniel Island, James Island |
| Mount Pleasant Waterworks (MPW) | ~3.4 gpg (moderately soft) | Chloramines | Low-to-moderate PFAS profile relative to Lake Moultrie utilities. Chloramine disinfection requires different filtration media than chlorine. | Mount Pleasant |
Source: brandos-workspace/resimulation/research/water-quality.json (accessed 2026-04-16); site/lib/neighborhoods.ts.
What Carnes Crossroads is asking
Yes. Carnes Crossroads is served by Summerville CPW, which delivers water at approximately 5.5 to 7.2 grains per gallon. That is classified as moderately hard. Newer homes in this conservation community are particularly well-suited for whole-home systems due to garage-accessible water mains.
Five PFAS compounds have been detected in the Summerville CPW water supply that serves Carnes Crossroads. PFUnA was measured at 1,183 times the EWG health advisory level. CPW has a $96 million remediation project underway with completion targeted for 2029 to 2031.
Pristine Water Networks installs whole-home Puronics water conditioning systems throughout Carnes Crossroads. We offer a free 45-minute in-home water test where a Pristine-certified technician tests your tap water on your counter and walks you through the results. No obligation.
Carnes Crossroads is served by Summerville Commissioners of Public Works (CPW), which sources water from Lake Moultrie via Santee Cooper. CPW uses chloramine as its secondary disinfectant (minimizes TTHM and HAA9 formation vs. free chlorine).
Carnes Crossroads water is approximately 5.5 to 7.2 grains per gallon, classified as moderately hard. This is the standard Summerville CPW delivery range sourced from Lake Moultrie via Santee Cooper. Conservation community construction often makes whole-home installation cleaner than older Summerville proper homes.
Carnes Crossroads tap water is Summerville CPW water. EWG testing of CPW data identified 11 compounds above EWG health guidelines, including TTHMs at approximately 168x EWG guideline, HAA9 at approximately 368x guideline, and five PFAS compounds with PFUnA at approximately 1,183x EWG advisory. All values are legal under current federal drinking water standards.
At approximately 7.2 grains per gallon, Carnes Crossroads is firmly in the moderately hard range. Whether a whole-home conditioner is worth installing depends on your appliance mix, family size, shower feel, and bottled water spending. A free in-home water test from Pristine gives you the math for your specific home before you decide.
Three local options serve Carnes Crossroads: Pristine Water Networks (authorized Puronics dealer, published pricing, Summerville-based), Wadford Water Works (family-owned, Charleston metro since 2007), and Culligan Charleston (national franchise). Pristine publishes $7,999 installed before the in-home visit. Culligan and Kinetico require a 60-90 minute sales call before giving a price. The right fit depends on what you value most.
Your neighbor, doing the work
“I’ve tested water in Carnes Crossroadshomes up and down these streets. If your water tests fine, I’ll tell you.”
Jarred Guidelli · Founder, Pristine Water Networks
Summerville, SC · SC-licensed partner plumber · Authorized Puronics dealer
Free in-home water test
45 minutes. On your counter. No pressure. If your water tests fine, we will tell you.