Written from field experience: This guide is written by an Alabama Grade IV Wastewater Operator with direct experience in north Alabama water systems. Recommendations are based on the contaminant profile of the Valley and Ridge aquifer and the documented industrial history of the Decatur area — not generic national content.
Test first, treat second
No treatment system works without knowing what you're treating. A comprehensive Morgan County panel runs $150–$350 through an ADEM-certified lab and tells you exactly what's in your water.
Include PFAS in your panel
The Decatur industrial corridor has documented PFOA and PFOS contamination. Private wells near the Tennessee River corridor are not monitored by any regulatory body — only a lab test reveals your actual level.
Buying or selling a home?
FHA, VA, and USDA loans require well testing for coliform, nitrate, nitrite, and lead at closing. Plan 2–3 weeks for results from an ADEM-certified lab.
The PFAS contamination history — what Morgan County well owners need to know
This is the section that most generic well water guides skip for Morgan County. It shouldn't be skipped.
PFOA and PFOS from 3M and Daikin in Decatur entered the Tennessee River water supply
In 2016, the EPA issued health advisories recommending that residents in Morgan and Lawrence counties avoid drinking their tap water after finding PFOA and PFOS at levels linked to cancer, thyroid disease, and developmental effects in children. The West Morgan-East Lawrence Water Authority — which serves parts of Morgan County through the Tennessee River — was the primary affected public system. 3M's Decatur manufacturing plant and Daikin's subsidiary Dyneon LLC were identified as the likely industrial sources. Daikin later settled a related lawsuit for $5 million.
| Date | Event |
|---|---|
| 2007 | EPA first tests Decatur water near 3M, Daikin, and Toray Carbon Fibers. Levels below then-current limits; elevated blood serum PFOA found in residents. |
| Late 2013 | USGS/EPA national study finds PFAS traces in Morgan and Lawrence County water supplies. |
| May 2016 | EPA issues health advisories. 100,000 north Alabama residents advised to avoid tap water. PFOA/PFOS above EPA advisory threshold. |
| Aug 2016 | West Morgan-East Lawrence reports levels drop to 14 ppt — below advisory. Activated carbon filtration installed. |
| 2016–2017 | Daikin settles for $5 million. Tennessee Riverkeeper files suit against 3M. |
| 2024 | EPA finalizes new PFAS MCLs: 4 ppt for PFOA, 4 ppt for PFOS. Far stricter than previous advisory levels. Public systems must comply by 2029. |
Private wells are not covered by the EPA's 2024 PFAS rule. The public water system has had filtration upgrades. Your private well has had nothing unless you put it there. Wells near the Tennessee River corridor, near the Decatur industrial area, or in alluvial valley soils are at higher risk. Only a lab test tells you your actual level — and the lab must specifically test for PFAS using EPA method 533 or 537.1.
Morgan County geology — what the Valley and Ridge aquifer means for your well
Most private wells in Morgan County draw from the Valley and Ridge aquifer system — a fractured limestone and dolomite formation running across north Alabama. Understanding the geology predicts the contaminants.
Hardness
Very likely — test for it
Limestone dissolves calcium and magnesium into groundwater. Scale on heaters, spots on dishes, poor soap lather are the everyday signs.
Iron and Manganese
Common — orange and black stains
Fractured rock allows iron-rich water to accumulate. Orange stains = iron. Black/brown stains = manganese. Both common in north Alabama wells.
Coliform Bacteria
Risk — especially after rain
Fractures in karst limestone are direct pathways for surface bacteria to reach groundwater. Test annually. Always test after flooding or heavy rain events.
Arsenic
3% exceedance risk (USGS)
Highest arsenic risk in north Alabama per USGS area modeling. Not a majority of wells — but the consequence of missing it is serious enough to test.
PFAS (PFOA/PFOS)
Morgan County specific — test it
Not a general Valley and Ridge issue — specific to Morgan County's industrial history. Wells near the Tennessee River and Decatur are at higher risk.
pH / Corrosivity
Generally neutral to alkaline
Limestone geology tends to buffer pH. Alluvial valley wells may differ. Low pH causes blue-green staining and pipe corrosion — include pH in your test panel.
The Morgan County test panel — what to order and why
| Contaminant | Why it's in this panel | Priority |
|---|---|---|
| Total coliform + E. coli | Universal baseline. Karst fractures make coliform contamination common after rainfall. Required for FHA/VA/USDA loans. | Always |
| Nitrate and nitrite | Required for federal loan programs. Rural and agricultural land use in parts of the county. Especially important for households with infants. | Always |
| Lead | Required for federal loan programs. Older well casings and household plumbing can contribute lead regardless of source water. | Always |
| Iron and manganese | Very common in Valley and Ridge wells. Need exact concentrations to size iron filter correctly. Different treatment for dissolved vs. particulate iron. | High |
| Hardness | Limestone geology makes elevated hardness the norm. Needed to size a water softener correctly and determine whether softening is worth the cost. | High |
| Arsenic | Morgan County has the highest USGS arsenic exceedance probability in north Alabama (3%). Arsenic has no taste, odor, or color — only a test reveals it. | High |
| PFAS (PFOA, PFOS, and suite) | Morgan County specific. Documented industrial contamination from Decatur plants. EPA MCL now 4 ppt. Must use EPA method 533 or 537.1. | High for county |
| pH and alkalinity | Determines corrosivity and guides treatment compatibility. Affects which softener media works best. | Moderate |
| Hydrogen sulfide | Add if you smell rotten eggs from the tap. Rotten-egg odor from hot water may be the water heater anode — test to confirm the source. | If symptomatic |
Where to test your Morgan County well
ADEM-certified laboratories — the right call for comprehensive testing
The Alabama Department of Environmental Management maintains a directory of certified drinking-water labs organized by contaminant type. These are the labs whose results are accepted for federal loan programs and legal purposes. For PFAS testing, specifically confirm the lab uses EPA method 533 or 537.1 — not all ADEM labs are PFAS-equipped. Call ADEM at (334) 271-7700 or visit ADEM.Alabama.gov for the current lab directory.
Cost range: $150–$350 for a comprehensive panel including bacteria, metals, hardness, arsenic, and PFAS. Basic coliform-only tests run $30–$50.
Mail-in test kits — convenient for initial screening
Kits from SimpleLab (Tap Score) and others ship to EPA-certified labs and work well for broad screening. The standard home panel covers bacteria, metals, nitrate, and common contaminants for around $150–$250. For PFAS, order a dedicated PFAS panel — it is not included in standard comprehensive panels.
SimpleLab Standard Home Water Test (200+ contaminants) →Test again after any of these events: flooding or heavy rain, nearby construction disturbing soil, livestock or septic system added within 100 feet, change in taste/odor/color, positive coliform result, or purchase of the property. Annual testing for bacteria and nitrate is the CDC recommendation for all private wells.
Treatment — matched to what Morgan County wells actually have
Treatment order matters. Install in this sequence: sediment → iron filter → softener → UV → RO (point of use). Installing in the wrong order shortens the life of every downstream component.
Iron and hardness — the most common Morgan County complaint
Treat firstAn air injection iron filter ahead of a salt-based water softener handles both. The iron filter uses an air pocket to oxidize dissolved iron into particulate form, then filters it out — no chemicals required. The softener following it handles hardness and any residual low-level iron. Don't reverse the order: iron above about 0.5 ppm fouls the softener resin bed rapidly and shortens its life significantly.
Coliform bacteria — a whole-house UV system
Install after iron filterUV disinfection after the iron and softener stages kills coliform and E. coli without chemicals or taste impact. UV only works in clear water — iron must be removed first or the UV light can't penetrate. NSF 55 certified units are the standard. Size the unit to your flow rate, not just your household size.
UV disinfection systems on Amazon →PFAS — reverse osmosis at the point of use, or whole-house RO
Morgan County priorityRO is what the EPA recommended for Morgan County residents during the 2016 contamination advisory. A whole-house RO system provides the most complete protection but is expensive ($2,000–$8,000 installed). For most households, a certified under-sink RO at the drinking faucet plus a shower filter provides practical protection at a fraction of the cost. Look for NSF/ANSI 58 certification and a specific PFOA/PFOS reduction claim — not all RO systems are certified for PFAS.
Arsenic — RO or adsorption media
Test first to confirmIf your test shows arsenic above 10 µg/L (the EPA MCL), RO removes it effectively. Whole-house arsenic adsorption media (iron-oxide based, such as Greensand Plus or activated alumina) is an alternative for whole-house removal. The Crystal Quest Thunder 1000CP used in some well installations includes optional arsenic cartridges. Always confirm your treatment system is rated for the arsenic form (arsenate vs arsenite) found in your water — a full metals panel distinguishes them.
Morgan County seasonal considerations
| When | What to watch for | Action |
|---|---|---|
| After heavy rain / flooding | Turbidity spike, coliform intrusion through karst fractures | Don't drink until you test. Retest within 2 weeks of any flooding event. |
| Spring / early summer | Agricultural runoff increases nitrate risk in low-lying areas | Include nitrate if you're near farmland. Especially important for households with infants under 6 months. |
| Summer drought | Low water table concentrates dissolved minerals — hardness, iron, and arsenic may increase | Check water softener salt levels. If taste changes, consider retesting. |
| Annual | General well health check | Bacteria and nitrate annually per CDC guidance. Full panel every 3–5 years or on any change. |
Common questions
What contaminants should I test for in a Morgan County private well?
At minimum: coliform, E. coli, nitrate, nitrite, and lead. Morgan County adds: iron, manganese, hardness, arsenic, and PFAS (PFOA/PFOS specifically). The PFAS test needs EPA method 533 or 537.1 — not all labs offer it.
Is PFAS in Morgan County well water still a concern?
Yes. Private wells aren't monitored. The documented contamination from 3M and Daikin in Decatur entered the Tennessee River system. Wells near the river corridor are at higher risk. The EPA's 2024 PFAS rule set enforceable MCLs of 4 ppt — far stricter than the old 70 ppt advisory. Only a lab test shows your actual level.
What causes orange stains in my Morgan County well water?
Iron — extremely common in Valley and Ridge aquifer wells. Test to get the concentration and form (dissolved vs. particulate vs. iron bacteria), then size an air injection iron filter accordingly. Don't guess on iron treatment — the wrong system for the wrong iron type doesn't work.
What is the best filter for PFAS in Morgan County?
Reverse osmosis — it's what the EPA recommended for area residents during the 2016 advisory. A point-of-use under-sink RO certified to NSF/ANSI 58 with a PFAS reduction claim handles the drinking and cooking water. Activated carbon provides partial PFAS reduction at the whole-house level. Test first to know whether you actually need it.
Does Morgan County well water need a softener?
Very likely. Limestone geology makes hard water the norm. Test first for the exact hardness number. If iron is also present, install the iron filter before the softener — iron above about 0.5 ppm fouls the resin bed and shortens softener life significantly.