Coastal Public Health Threatened by Salinity
A severe drinking water crisis driven by rising salinity levels in southwestern coastal districts, particularly in Dakop of Khulna and Shyamnagar of Satkhira, is sparking a major public health emergency. Under a scorching sun, groups of local women walk miles carrying water pitchers to find a pond or filtration unit that might yield a few drops of fresh water. While sweet water was once easily accessible from local household ponds and shallow tubewells, the surrounding Shibsa, Pasur, and Kopotaksho rivers now overflow with saltwater. Driven by climate change and recurring cyclones, rising sea levels continuously contaminate groundwater, leaving permanent scars of salinity across coastal communities.
The intrusion of saltwater into agricultural land has rendered traditional crop production nearly impossible, shattering the local agrarian economy and causing widespread economic dislocation. Desperate to sustain their households, men frequently migrate to urban brick kilns for physical labor or venture into the deep sea for dangerous fishing expeditions. Left behind, women bear the acute anxiety of compounded financial distress, loss of livestock, and diminished family income. The daily struggle to secure safe water forces these women to spend valuable hours fetching water, placing a severe physical and psychological burden on coastal households.
A recent study published in a Springer Nature journal, jointly conducted by the International Centre for Diarrhoeal Disease Research, Bangladesh (ICDDR,B) and the National Institute of Population Research and Training (NIPORT), highlights the acute intersection of climate stress and human health. The researchers demonstrated that coastal women face compounding health risks where environmental hazards meet severe psychological strain. Over 75 percent of the more than 4,000 women surveyed experience moderate to severe mental stress. This recurrent environmental uncertainty causes chronic anxiety and depression, disrupting nervous system regulation and quietly paving the way for life-threatening illnesses.
Long-term intake of high-salinity drinking water is closely tied to major cardiovascular risks among coastal inhabitants, making hypertension a widespread phenomenon. The ICDDR,B and NIPORT study revealed that nearly 25 percent of coastal women currently suffer from high blood pressure. Scientifically, an increase of 100 milligrams of sodium per liter of drinking water elevates high blood pressure risks by at least 10 percent. Crucially, women who endure both high salinity exposure and chronic psychological stress face two and a half times the risk of developing hypertension compared to the general population.
Despite the growing prevalence of cardiovascular conditions, low health literacy causes many marginalized villagers to mistake serious hypertension symptoms for mild physical fatigue. Symptoms like severe neck pain or persistent dizziness are often casually dismissed as simple weakness rather than recognized as warning signs of hypertension. Because these remote coastal populations lack access to regular medical check-ups and diagnostic facilities, high blood pressure operates as a silent killer. The absence of routine health monitoring leaves thousands of women untreated until acute, life-threatening complications manifest suddenly.
Coastal women carry the heaviest physiological burden of this environmental crisis, particularly concerning maternal and reproductive health. Medical researchers warn that consuming high-salinity water during pregnancy substantially increases the risk of pre-eclampsia and gestational hypertension, directly contributing to maternal mortality and premature miscarriages. Furthermore, the lack of fresh water severely compromises menstrual hygiene management. Forced to wash sanitary cloths in saline or contaminated water, many women suffer recurring uterine infections and complex gynaecological conditions, prompting some young women to undergo desperate hysterectomies due to inadequate medical care.
Children residing in these coastal zones are equally vulnerable to salinity exposure, suffering long-term impacts on their growth and overall development. Possessing weaker immune systems, children frequently develop skin diseases from bathing in saline water, along with repeated outbreaks of severe diarrhoea and dysentery. Persistent illnesses coupled with reduced agricultural yields lead to chronic malnutrition among young populations. As soil salinity kills local fruit trees and renders vegetable trellises bare, natural dietary sources of vital nutrients are systematically wiped out across coastal villages.
The salinity crisis exposes deep structural inequalities, as wealthy households cushion the impact while impoverished families face the full severity of environmental damage. Affluent residents can afford bottled water, modern rainwater harvesting units, or private deep tubewells to bypass saltwater intake. Conversely, poor households remain entirely dependent on degraded environmental water sources for daily consumption. Public adaptation projects often fail to reach the most vulnerable, ensuring that health risks and economic burdens fall disproportionately upon those who lack the financial means to adapt independently.
Health experts emphasize that treating high blood pressure through conventional medication alone is insufficient without addressing the root environmental and psychological causes. Integrating mental health screenings, deploying trained counselors to primary health centers, and implementing community-based water treatment systems are critical steps for coastal survival. As global temperatures rise and sea levels climb, saline intrusion will penetrate further inland. Ensuring the fundamental right to safe drinking water and reinforcing coastal healthcare infrastructure are non-negotiable prerequisites for achieving true climate justice for vulnerable communities.
Author: Student, Department of Disaster Science and Management, Begum Rokeya University
