Legal limits do not equal optimal health. All contaminants on this page are within EPA legal limits. EWG exceedances reflect EWG's more conservative health thresholds — not regulatory violations. Gallatin's water is legally safe to drink. This guide explains what's detected and what removes it.
2025 Official CCR Data — Castalian Springs-Bethpage Utility District
The Castalian Springs-Bethpage Utility District 2025 Consumer Confidence Report provides the most current verified data for any Gallatin-area utility. Source: purchased from both Gallatin Water Department and Hartsville — both drawing from the Cumberland River.
TTHMs: 73.55 ppb LRAA (range 34.30–76.80) — within EPA 80 ppb limit but closely approaching it. HAA5: 49.10 ppb LRAA (range 23.10–61.70) — within EPA 60 ppb limit. Chlorine: 1.09 ppm avg (0.32–2.20). Nitrate: G:0.375 / H:0.400 ppm (2025). Fluoride: H:0.58 / G:0.400 ppm. Lead: 90th percentile <2.0 ppb — 0 of 30 households exceeded action level. Copper: 0.0458 ppm (90th percentile). Turbidity: Hartsville 99.70% below limit; Gallatin 100% below limit. Total Coliform RTCR: 1 positive in March 2025 (15 routine samples) — all repeat samples tested negative. CCR content violation: Lead & Copper notification letters mailed late (12/19/2024 — should have been within 30 days of testing). This is a paperwork timing issue, not a water quality concern. Contact: Kevin Lee (CSB District Manager) at 615-841-3724. Board meets 2nd Thursday at 4:30pm · 1010 Hinton Road, Bethpage TN.
Castalian Springs-Bethpage CCR content violation — context: CSB received a CCR content violation in 2025 because Lead & Copper consumer notification letters were mailed on December 19, 2024 instead of within the required 30-day window. This is a paperwork and timing violation — not a water quality exceedance. The 2025 CCR confirms lead was below the action level in all 30 households sampled (90th percentile <2.0 ppb). The water quality was not unsafe; the administrative deadline was not met. The violation was reported to Tennessee DWR.
Your Four Gallatin-Area Utilities at a Glance
Gallatin and the surrounding Sumner County area are served by four separate water utilities depending on your address. Gallatin Water Department is the hub — it treats Cumberland River water and sells it wholesale to Castalian Springs-Bethpage. Check your water bill to confirm your utility.
White House Utility District (WHUD)
Castalian Springs-Bethpage UD
Laguardo Utility District
Gallatin Water Department is the regional hub
Gallatin Water Department treats Cumberland River water and sells it wholesale to Castalian Springs-Bethpage, meaning CSB's water quality is directly tied to Gallatin's treatment plant. When you understand Gallatin's water chemistry — Cumberland River disinfection byproducts, PFOA, chromium-6, and nitrate — you understand Castalian Springs-Bethpage's water too. The key difference: CSB's 2025 TTHMs (73.55 ppb avg) are higher than Gallatin's, which may reflect the distribution distance, temperature effects, or supplemental Hartsville water chemistry.
Contaminants Exceeding EWG Health Guidelines
All contaminants below are within EPA legal limits. CSB 2025 CCR figures are shown alongside EWG historical data. Gallatin, WHUD, and Laguardo figures are from EWG's database (2013–2024).
HAA5/9 above EWG
HAA5/9 above EWG
HAA5: 49.10 ppb LRAA
(source from Gallatin + Hartsville)
All Four Utilities — Side-by-Side Comparison
| Contaminant | EWG Guideline | Gallatin WD TN0000253 |
WHUD TN0000745 |
CSB UD TN0000097 · 2025 CCR |
Laguardo UD TN0000394 |
|---|---|---|---|---|---|
| Bromodichloromethane | 0.06 ppb | 5.00 ppb · 83x | 5.35 ppb · 89x | 6.32 ppb · 105x | Above EWG |
| TTHMs (group) | 0.15 ppb / 80 ppb | Above EWG | Above EWG | 73.55 ppb LRAA (34.30–76.80) | Above EWG |
| HAA5 | 0.1 ppb / 60 ppb | Above EWG | Above EWG | 49.10 ppb LRAA (23.10–61.70) | Above EWG |
| PFOA / PFAS | 0.09 ppt / 4 ppt | Above EWG | Above EWG | Not in 2025 CCR | Not in EWG data |
| Chromium-6 | 0.02 ppb | Above EWG | Above EWG | Not in CCR | Not in EWG data |
| Nitrate | 0.14 ppm / 10 ppm | Above EWG | Above EWG | 0.400 ppm · 2.8x EWG (2025) | Above EWG |
| Lead (most recent) | 0 / AL 15 ppb | EWG data | EWG data | 0/30 exceeded AL · 90th% <2.0 ppb (2025) | EWG data |
| Source water | — | Cumberland River | Cumberland R. watershed | Purchased (Gallatin + Hartsville / Cumberland R.) | Groundwater (surface influenced) |
| Above EWG / Total | — | 10 of 15 | 9 of 16 | 9 of 13 | 8 of 12 |
Protecting Children & Pregnant Women in Gallatin
Children and pregnant women face elevated risk from several contaminants detected in Gallatin-area water — not because the water violates safety standards, but because developing bodies are more vulnerable to the same exposures that adults tolerate better.
Disinfection byproducts — bromodichloromethane, chloroform, and haloacetic acids — have been linked in epidemiological studies to pregnancy complications including low birth weight, preterm birth, and neural tube defects at sustained exposure levels. For CSB customers, where TTHMs reach 73.55 ppb avg and quarterly highs of 76.80 ppb, this is a meaningful concern. The first trimester is the highest-risk window. An under-sink reverse osmosis system for all drinking and cooking water provides the most complete protection during pregnancy.
Nitrate at high concentrations causes methemoglobinemia ("blue baby syndrome") in infants under 6 months. All Gallatin-area utilities are well below the 10 ppm EPA acute limit. However, if you are mixing infant formula with tap water, use RO-filtered water — it eliminates this concern entirely. Never use boiled tap water for formula (boiling concentrates nitrate, it doesn't remove it). Use cold RO-filtered or bottled water for all formula preparation.
CSB's 2025 CCR confirms 0 of 30 households exceeded the lead action level. However, lead comes from home plumbing, not the utility supply. Homes built before 1986 may have lead solder at pipe joints. Children under 6 and pregnant women are most vulnerable — there is no safe level of lead exposure for young children. Always use cold tap water for cooking (hot water mobilizes lead faster). Flush the tap for 30 seconds if water has sat overnight before using it.
PFOA is detected above EWG's guideline in Gallatin Water Department. Studies link PFAS exposure during pregnancy and early childhood to immune system suppression, thyroid disruption, and developmental effects. Children who grow up drinking PFAS-contaminated water may have reduced vaccine effectiveness and altered hormone levels. Reverse osmosis removes PFOA most effectively — a whole-house carbon filter provides partial reduction at every tap and shower.
Your Pets & Gallatin Water Quality
The same contaminants in Gallatin's water that concern health researchers affect your pets too — and smaller animals face a more concentrated impact. A 12-pound dog drinking Cumberland River tap water all day is exposed to proportionally far more TTHMs, PFOA, and nitrate relative to body weight than an adult human drinking the same water.
A 15-pound dog drinking the same TTHM-level water as a 160-pound adult receives roughly 10x the relative exposure per pound of body weight. Long-term TTHM exposure has been studied in dogs and linked to elevated bladder cancer risk — Scottish Terriers and other breeds are considered particularly susceptible. PFOA accumulates in animal tissue the same way it does in humans, building up over a lifetime of tap water consumption. The simplest fix: fill your pet's bowl from the same RO-filtered tap you use for your family's drinking water.
Rabbits, guinea pigs, hamsters, and birds have extremely small body masses — a 2-pound rabbit drinking unfiltered tap water is exposed to contaminant concentrations that would be proportionally enormous for a human. Nitrate, which poses the greatest acute risk at small body sizes, is well below the EPA limit in Gallatin water but still above EWG's guideline. For small caged animals and birds, RO-filtered water is strongly recommended.
Chlorine and chloramine in Gallatin tap water (1.09 ppm avg in CSB's 2025 CCR) is directly toxic to fish and most aquarium invertebrates at concentrations considered safe for humans. TTHMs and other disinfection byproducts further stress aquatic life. Never add untreated tap water directly to a fish tank. Activated carbon removes free chlorine. Reverse osmosis water is the gold standard for sensitive species, reef aquariums, and shrimp tanks — it removes chlorine, TTHMs, nitrate, and PFOA entirely.
Dogs and cats: Use RO-filtered water for their bowl — the same water you drink. If you have a whole-house carbon filter, filtered tap water is a meaningful improvement over unfiltered. Small animals and birds: RO or filtered water strongly recommended given their small body mass. Fish and aquatic pets: Always dechlorinate tap water before adding to tanks; use RO water for sensitive species. Never boil tap water for aquarium use — boiling removes oxygen and concentrates minerals, it does not remove chloramine or TTHMs.
What Hard Water Is Doing to Your Home Every Day
Gallatin and Sumner County water from the Cumberland River flows through Tennessee's limestone geology, picking up calcium and magnesium that treatment does not remove. These daily effects are chemistry problems — not cleaning product problems.
Calcium and magnesium ions disrupt the skin's moisture barrier after showering, causing dryness and irritation. Research links water hardness to eczema severity in children. Hard water coats the hair shaft with mineral deposits — hair feels rough, looks dull, color-treated hair fades faster. A softener or KDF showerhead filter addresses this directly.
White spots and cloudy film on glasses are calcium carbonate — the same mineral as limestone. When Cumberland River hard water evaporates in your dishwasher, minerals bond to surfaces. Dishwasher detergent needs 50–75% more product to lather effectively in hard water. A softener eliminates spotting and extends appliance life.
Mineral deposits build up in fabric fibers — clothes feel stiff, whites yellow, colors fade faster. Clothes washed in hard water wear out up to 15% faster. Towels lose absorbency. A softener restores detergent effectiveness and significantly extends garment life.
Scale on water heater elements reduces efficiency 8% per GPG (U.S. Dept. of Energy). At Gallatin's typical hardness, scale accumulates in hot water systems over 2–4 years. Dishwashers, washing machines, and coffee makers degrade faster. Tankless water heater heat exchangers are the most vulnerable.
Cumberland River Limestone Hard Water in Gallatin
The Cumberland River flows through Tennessee's limestone-rich geology before reaching Gallatin's intake. Gallatin and Sumner County water is typically moderately hard to hard — the limestone bedrock dissolves calcium and magnesium into the river upstream. Private wells in Sumner County limestone aquifers can be significantly harder. Treatment does not remove hardness minerals.
Gallatin Hard Water Impact Calculator
Enter your water's hardness reading to see classification, appliance lifespan impact, and recommended softener size. Default set to Gallatin's typical Cumberland River average.
Cumberland River Limestone Hard Water Impact Calculator
Defaults set to Gallatin'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 Mod. Hard
3–5 Hard
7–10 Ext. Hard
10.5+
Gallatin & Sumner County Area Water Guide
Which utility serves your address depends on your location in Sumner and Wilson counties. Here's what you need to know based on where you live.
Find Your Area
Chlorine Residual in Gallatin Water
Gallatin City Services Board (CSB) uses chlorine as its primary disinfectant — with one of the lowest residuals in the Middle Tennessee 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 Clarksville’s biggest water quality concerns.
Gallatin tap water runs at pool-level chlorine concentration
Gallatin CSB’s verified chlorine residual is 1.09 ppm average (2025 CCR) — the lowest in the Middle Tennessee Water Authority guide series, roughly half of Dickson’s 2.56 ppm level. For comparison, the EPA-recommended range for a swimming pool is 1.0–3.0 ppm — meaning your Gallatin 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 Gallatin 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 1.09 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 Clarksville 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 1.09 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 Gallatin
Infants under 12 months should not drink tap water containing chlorine without filtration — including water used to mix formula. Clarksville’s verified 1.09 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 1.09 ppm — at the top of the pool range — Clarksville 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 Clarksville’s 1.09 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 Gallatin homes concerned about chlorine and Old Hickory Lake disinfection byproducts, TTHMs, HAAs), a whole-house carbon system addresses both problems in one installation. See the filter recommendations below for Gallatin-specific sizing and pricing.
Filter Recommendations for Gallatin & Sumner County Homes
Filter Recommendations for Gallatin & Sumner County Homes
Filter Recommendations for Gallatin & Sumner County Homes
Cumberland River disinfection byproducts are the dominant chemical concern across all four local utilities. CSB customers face the highest TTHM levels in the area (73.55 ppb avg — approaching EPA limits). All utilities benefit from the same three-stage approach.
The Gallatin Water Treatment Recommendation
Get a personalized recommendation for your Gallatin address.
Connect with a vetted Sumner County water treatment professional.