Legal limits do not equal optimal health. Every contaminant on this page is within EPA legal limits. WADC's 2025 CCR confirms full compliance with no violations. "Exceeds EWG guideline" means detection above EWG's more conservative health thresholds — not a regulatory violation. Dickson's water is safe by federal standards. This guide explains what's in it and what removes it.
2025 Official CCR Data — Water Authority of Dickson County
WADC published its 2025 Consumer Confidence Report in March 2026. This is the most current verified data available for Dickson County water. Key findings directly from the 2025 CCR:
TTHMs (Total Trihalomethanes): 40 ppb avg (range 18–61 ppb) — within EPA 80 ppb limit. HAA5 (Haloacetic Acids): 37 ppb avg (range 19–56 ppb) — within EPA 60 ppb limit. Chlorine: 2.56 ppm avg (1.13–3.54 ppm). Nitrate: 0.47 ppm max (0.11–0.47 range, tested Oct 2025). Fluoride: 0.61 ppm avg (0.29–0.88). Sodium: 8.8 ppm max. Lead: BDL (below detection limit) — 0 of 30 households exceeded action level. Copper: 0.0753 ppm (90th percentile). Turbidity: 0.17 NTU max — 100% of monthly samples below 0.3 NTU limit. No violations in 2025.
Source: Piney River + Water Authority of Dickson (purchased). 10 contaminants detected, all at safe levels. Contact: Todd Cash at 931-670-3142. Board meets 3rd Thursday at 6pm at the utility office. Both 2025 CCRs confirm these utilities had zero regulatory violations in 2025.
Your Four Dickson County Utilities at a Glance
Dickson County is served by four separate water utilities. WADC is the largest and most data-rich, treating Piney River, Turnbull Creek, or Cumberland River water. Bon Aqua-Lyles purchases supplemental water from WADC. Check your water bill to confirm which utility serves your address.
Sylvia-Tenn City-Pond UD
Vanleer Water Department
Why Dickson water has elevated disinfection byproducts
WADC draws from the Piney River, Turnbull Creek, or the Cumberland River depending on drought conditions and system needs. Surface water contains natural organic matter — leaves, soil, plant material — that reacts with chlorine during treatment to form TTHMs and HAAs. The Piney River watershed's organic content is the primary driver. This is the same mechanism seen across Middle Tennessee's surface water utilities — it is the predictable chemistry of disinfecting organic-rich river water, not a treatment failure.
Contaminants Exceeding EWG Health Guidelines
All contaminants below are within EPA legal limits. The verified 2025 CCR figures for WADC are shown alongside EWG's historical data (2013–2023) where both are available. EWG numbers for Bon Aqua-Lyles, Sylvia-Tenn, and Vanleer are from the EWG database.
range 19–56
range 18–61
(0.11–0.47 range)
All Four Utilities — Side-by-Side Comparison
| Contaminant | EWG Guideline | WADC TN0000191 |
Bon Aqua-Lyles TN0000066 |
Sylvia-Tenn TN0000691 |
Vanleer TN0000724 |
|---|---|---|---|---|---|
| Bromodichloromethane | 0.06 ppb | 4.57 ppb · 76x | 3.64 ppb · 61x | 4.02 ppb · 67x | 1.37 ppb · 23x |
| Chloroform | 0.4 ppb | 32.9 ppb · 82x | 16.1 ppb · 40x | Above EWG | Low / not specified |
| TTHMs (2025 verified) | 0.15 ppb | 40 ppb avg (18–61) | Similar profile | Above EWG | Above EWG |
| HAA5 (2025 verified) | 0.1 ppb | 37 ppb avg (19–56) | Above EWG | Above EWG | Above EWG |
| Nitrate | 0.14 ppm | 0.47 ppm · 3x EWG (2025) | Not specified | Not specified | Not specified |
| Lead | 0 | BDL — 0 of 30 exceeded AL (2025) | Not specified | Not specified | Not specified |
| Source water | — | Piney R. / Turnbull Cr. / Cumberland R. | Piney River + WADC | Purchased surface water | Surface water |
| Above EWG / Total | — | 8 of 19 | 9 of 13 | 9 of 20 | 8 of 9 |
Vanleer context: Vanleer Water Department has 8 contaminants above EWG out of only 9 total detected — the highest ratio of any Dickson area utility. This doesn't mean Vanleer water is more dangerous (all levels are within EPA legal limits), but it does reflect EWG's sensitivity to even low levels. The positive: Vanleer shows the lowest bromodichloromethane (1.37 ppb) and low chloroform of any utility in the county.
What Hard Water Is Doing to Your Home Every Day
Dickson County water from limestone-influenced source waters creates daily effects most residents notice but rarely connect to their water supply. These aren't cleaning or product problems — they're calcium and magnesium mineral effects.
Calcium and magnesium ions disrupt the skin's natural moisture barrier after showering, causing dryness and irritation. Research links water hardness directly to eczema severity in children. Hard water coats the hair shaft with mineral deposits — hair feels rough, dull, and color-treated hair fades faster. A softener or KDF showerhead filter addresses this at the source.
White spots and cloudy film on glasses are calcium carbonate — the same mineral that forms limestone. When Dickson County hard water evaporates in your dishwasher, minerals bond to surfaces and won't wash off. Dishwasher detergent requires 50–75% more product to lather effectively in hard water. A softener eliminates spotting entirely.
Hard water mineral deposits build up in fabric fibers — clothes feel stiff, white fabrics yellow, colors fade. Mineral interference with detergent means longer cycles and more product. Studies show clothes washed in hard water wear out up to 15% faster. Towels lose absorbency over time. A softener restores detergent effectiveness and extends garment life.
Scale buildup on water heater elements reduces efficiency by 8% per GPG of hardness (U.S. Dept. of Energy estimate). At 8 GPG, that's significant efficiency loss and shortened appliance life. Dishwashers, washing machines, and coffee makers all degrade faster. Tankless water heater heat exchangers are particularly vulnerable — scale can cause failure within 2–3 years on untreated hard water.
Dickson County Limestone Hard Water
WADC draws from three possible source waters — the Piney River, Turnbull Creek, and the Cumberland River. All flow through or near Dickson County's limestone geology, picking up calcium and magnesium that treatment does not remove. The Cumberland River (used during drought periods) tends to be harder than the Piney River. Typical city water hardness for WADC customers runs moderately hard. Private wells in Dickson County limestone aquifers can be significantly harder.
Dickson County Hard Water Impact Calculator
Enter your water's hardness reading to see classification, appliance lifespan impact, and recommended softener size. Default set to Dickson's typical average.
Dickson County Hard Water Impact Calculator
Defaults set to Dickson's typical city water level. Adjust to match your specific test results.
Soft 3.5 GPG
Slightly Hard 7 GPG
Hard 10.5 GPG
Extremely Hard
Eco120°F
Standard130°F140°F
Tankless
PPM / mg/L (CCR units)
Grains per gallon
0–3 Moderate
3–5 Hard
7–10 Extremely Hard
10.5+
Dickson County Area Water Guide
Different parts of Dickson County are served by different utilities. Here's what you need to know based on where you live.
Find Your Area
Chlorine Residual in Dickson Water
Water Authority of Dickson County (WADC) uses chlorine as its primary disinfectant — at the highest average residual in the Middle Tennessee Water Authority guide series. While chlorine effectively kills bacteria and viruses, the residual that reaches your tap is worth knowing — especially because it directly drives the formation of the disinfection byproducts (TTHMs, HAAs, chloroform, bromodichloromethane) that are Dickson’s biggest water quality concerns.
Dickson tap water runs at the top of pool-level chlorine concentration
WADC’s verified chlorine residual is 2.56 ppm average (2025 CCR) — the highest in the Middle Tennessee Water Authority guide series, and significantly above Nashville’s 1.60 ppm. Dickson’s chlorine level is nearly at the top of the EPA’s recommended swimming pool range. For comparison, the EPA-recommended range for a swimming pool is 1.0–3.0 ppm — meaning your Dickson tap water contains chlorine at roughly the same concentration as pool water. This is within legal limits and effective for disinfection, but it is the direct cause of the elevated TTHMs and haloacetic acids in Dickson water. An NSF/ANSI 42-certified activated carbon filter removes chlorine taste and odor completely and reduces the formation of disinfection byproducts at the point of use.
Bottom line: You cannot taste or smell chlorine at 2.56 ppm the way you do in a pool because pool water is on your skin, not passing through your palate. But the chemistry is the same — and in Dickson water it reacts with source water organic matter to form TTHMs and haloacetic acids above EWG guidelines. A whole-house activated carbon system is the most effective way to intercept chlorine before it reacts with your pipes and fixtures.
What chlorine at pool levels does to your body and home
Chlorine strips the skin’s natural oils and disrupts the moisture barrier. At 2.56 ppm — daily shower exposure — it causes dryness, itching, and irritation. People with eczema or sensitive skin often notice significant improvement after installing a whole-home carbon filtration system.
Chlorine oxidizes hair proteins, breaking down the outer cuticle layer. This causes dryness, frizz, brittleness, and color fade in dyed hair. At pool-range concentrations, daily washing strips the natural sebum that keeps hair supple. A shower-head carbon filter or whole-house system prevents this entirely.
Chlorine is an antimicrobial agent — that is exactly why utilities use it. Consumed daily in drinking water, it does not distinguish between harmful pathogens and beneficial gut microbiome bacteria. Emerging research links chronic chlorinated water consumption to microbiome disruption and digestive sensitivity. An under-sink carbon or RO filter removes chlorine from drinking water completely.
Chlorine bleaches and degrades fabric fibers over time, causing colors to fade faster, whites to yellow, and fabrics to wear thin sooner than they should. This is especially noticeable on dark clothing and athletic wear. Whole-house activated carbon filtration extends the life of clothes and towels significantly — a measurable return on investment over time.
The same pool-level chlorine that causes red, irritated eyes when swimming is present in your shower steam. Daily inhalation of chlorinated steam during showers exposes mucous membranes to chlorine gas byproducts. People with asthma or respiratory sensitivity often notice shower-steam irritation that disappears after installing a carbon shower filter.
Dogs and cats absorb chlorine through their skin and ingest it while drinking tap water. Many pet owners report improved coat condition after switching to filtered water. Chlorinated water also stresses chlorine-sensitive houseplants — fiddle leaf figs, ferns, and tropical plants in particular. Letting tap water sit overnight allows some chlorine to off-gas, but carbon filtration removes it completely and instantly.
Chlorine and newborn health in Dickson
Infants under 12 months should not drink tap water containing chlorine without filtration — including water used to mix formula. Dickson’s verified 2.56 ppm chlorine residual is the highest in the Middle Tennessee guide series — nearly double Nashville’s 1.60 ppm. The EPA sets no specific infant standard for chlorine, but pediatric health research consistently identifies disinfection byproducts (TTHMs, HAAs) from Duck River chlorination as a concern for early-life exposure.
Chlorine and its byproducts (TTHMs, HAAs) concentrate in formula made with unfiltered tap water. At 2.56 ppm — at the top of the pool range — Dickson tap water carries the highest disinfection byproduct formation potential of any city in this series. An NSF/ANSI 42 activated carbon filter at the kitchen tap removes chlorine completely before mixing.
A newborn’s gut microbiome is still colonizing in the first months of life. Chlorine is antimicrobial by design — it does not distinguish between pathogens and beneficial bacteria. Filtered water is recommended for all infant consumption during this critical developmental window.
A newborn’s skin is 20–30% thinner than adult skin and absorbs chlorine during bathing. Pool-level residuals in tap water dry and irritate the developing skin barrier. A whole-home carbon filter removes chlorine from bath water — the most complete protection for infants bathing daily.
Chlorine off-gasses from warm water. During an infant bath or humidifier use with unfiltered tap water, the baby inhales chlorinated steam — a concern for developing lungs and airways. Whole-home carbon filtration removes chlorine before it reaches the tap, eliminating this exposure pathway.
If you have a newborn or are expecting: An NSF/ANSI 42 activated carbon filter at the kitchen tap removes chlorine from drinking and formula water. A whole-home carbon system removes it from bath water and humidifiers as well. At Dickson’s 2.56 ppm level — the highest in Middle Tennessee — this is the single most important water filter investment for any household with a newborn.
The fix is simple and affordable. An NSF/ANSI 42-certified activated carbon filter — whether whole-house or under-sink — removes chlorine completely at the point of use. For Dickson homes concerned about chlorine at 2.56 ppm, PFOA, and disinfection byproducts, TTHMs, HAAs), a whole-house carbon system addresses both problems in one installation. See the filter recommendations below for Dickson-specific sizing and pricing.
Filter Recommendations for Dickson County Homes
Filter Recommendations for Dickson County Homes
Disinfection byproducts from Piney River / Cumberland River treatment are the dominant chemical concern. Moderate limestone hardness is the primary infrastructure concern. The same three-stage approach works for all four Dickson utilities.
The Dickson County Water Treatment Recommendation
Get a personalized recommendation for your Dickson County address.
Connect with a vetted local water treatment professional.