Promoting household food security and reducing malnutrition rates of a growing population with the same amount of water is a challenge facing South African nutritionists and agriculturalists alike. Apart from non-food related effects of agriculture in general, the crop and livestock production practices of the South African smallholder farmer may have nutritional implications, primarily when practised on residential land and resulting in home consumption. Yet, few studies have systematically investigated the impact thereof. It appears that crop diversification, gender issues and nutrition education are among the important factors that strengthen the link between agriculture and nutrition. Since food production is the most water-intensive activity in society, nutritional water productivity (i.e. nutrition per volume water) of foods and the nutritional water footprint of diets should be investigated in order to achieve a sustainable solution. This implies that both the demand for a diet consisting predominantly of water-productive plant products, as well as the supply thereof, be addressed.

Interventions of water harvesting technologies (WHTs) in drought-prone areas like the Tigray region (northern Ethiopia) is an option less strategy to alleviate food insecurity issues emanating from water scarcity. Hence, wide spectrums of WHTs were applied in Tigray Region in the last three decades. Thus, this study aimed to assess the WHTs and the subsequent contributions in ensuring households’ food security in Kilete-Awlaelo district of the Tigray Region. Quantitative and qualitative data were collected through a household survey (n = 246), focus group discussion, key informants interview, and field observation, and subjected to descriptive and inferential statistical analysis on the SPSS environment. The explanatory power of the WHTs to food security was determined using a regression model. The result revealed that 64.6% of the households applied WHTs while 35.4% not. Though a statistically significant positive relationship (p < 0.05) between the WHTs (predictor) and PCC acquisition as food security parameter (predictand) was observed, the magnitude was not strong enough where only 6.1% of WHTs users and 0.81% of non-users had achieved the average standard PCC requirement (2100 kcal) from their farm production. Hence, strengthening and expanding the functional domain of the WHTs fitting to the socio-economic, environmental, and biophysical context of the locality is profoundly indispensable.