Solidarity Inc

Our mission is to provide community-driven, public health-based engineering to people in crisis.

aka Solidarity Engineering   |   Philadelphia, PA   |

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Solidarity Inc

EIN: 85-3924084


Believing in building systems that protect health, Solidarity is a women-founded, women-led, humanitarian engineering organization. Our mission is to provide community-driven, public health-based engineering for people in crisis. As engineers, infrastructure specialists, and technology experts, we have a wide scope of programming that prioritizes the root causes of public health crises that often compound in humanitarian settings. We break our activities into three programs: Water, Sanitation, Hygiene (WASH) & Basic Infrastructure; Science, Technology, Engineering, Art, Mathematics (STEAM) & Play; and Data & Advocacy.

Ruling year info


Executive Director, Co-Founder

Erin Hughes

Main address

1731 Sepviva Street

Philadelphia, PA 19125 USA

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Subject area info

STEM education

Public health

Water access, sanitation and hygiene

Civil engineering

Disasters and emergency management

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Population served info

Immigrants and migrants

Refugees and displaced people

NTEE code info

Disaster Preparedness and Relief Services (M20)

IRS subsection

501(c)(3) Public Charity

IRS filing requirement

This organization is required to file an IRS Form 990-N.


Programs and results

What we aim to solve

SOURCE: Self-reported by organization

Tens of thousands of refugees, migrants, asylum-seekers, and displaced populations from all over Latin America and other parts of the globe spend months and even years of their lives trapped in dangerous Mexican border cities, awaiting asylum in the United States. Many have fled their home country due to religious or political persecution, civil war, gang violence, extreme poverty, and climate change displacement. Now they are trapped in cities where murder, armed robbery, carjackings, kidnappings, extortion, and sexual assault are common. Unjustly, the populations we work with are particularly vulnerable to these atrocities. These camps are overcrowded and incredibly under-resourced. Most people sleep in tents and have limited access to WASH infrastructure, shade, electricity, education, and other basic needs. In the absence of support from governments or large international organizations, there is a critical need to address these inhumane conditions.

Our programs

SOURCE: Self-reported by organization

What are the organization's current programs, how do they measure success, and who do the programs serve?

Water, Sanitation, Hygiene (WASH) & Basic Infrastructure

According to UNICEF, preventable WASH-related disease is the highest cause of death for displaced children. In conflict zones, children under the age of 5 are 20 times more likely to die from diarrheal disease than from the conflict itself.

Working at the intersection of disaster response and development, Solidarity has a wide range of WASH and infrastructure activities that address sudden-onset needs (such as the provision of emergency water, portable toilets, and hygiene supplies) and long-term regional needs (such as capital construction of shelters and infrastructure). Our projects have a wide range of public health initiatives: from the design, construction, and maintenance of water and stormwater systems to menstrual health promotion with Doctors Without Borders.

Population(s) Served

As infrastructure specialists, we prioritize infrastructure that is most pressing to public health, ensuring that our approach accounts for the needs of the entire population- intentionally including children. The shortage of play opportunities for displaced populations is often a result of limited resources, overcrowded conditions, and a focus on immediate survival needs, leaving insufficient attention and resources allocated to the crucial role of play.

Play is critical to the public health of displaced populations as it offers a vital outlet for emotional expression, social integration, and psychological healing, particularly among vulnerable populations, thereby contributing to overall well-being and resilience. Through the construction of playgrounds, implementation of community-based murals, and facilitation of STEAM classes, our Play & STEAM programming centers on the survival and development needs of children in both the immediate and long-term.

Population(s) Served
Children and youth

In our project locations, we are one of the few aid organizations present. This is partially because traditional humanitarian response efforts categorize priorities into disaster/emergency response, which is immediate but temporary, or development, which is long-term. The reality is that displacement is often both an immediate disaster and a potentially indefinite circumstance–this gap in how populations are defined leads to an ever-widening chasm in the delivery of humanitarian aid. Political realities also prevent aid from reaching certain populations, as larger humanitarian organizations like the U.N. are subject to legislation and can lack organizational agility.

This is why technology-based and data-driven advocacy is an indispensable pillar of our work. By using various technologies including drone imagery, Geographic Information Systems (GIS), and Artificial Intelligence (AI), we increase the long-term efficacy of our projects.

Population(s) Served

Where we work

Our results

SOURCE: Self-reported by organization

How does this organization measure their results? It's a hard question but an important one.

Liters of potable water delivered

This metric is no longer tracked.
Totals By Year
Population(s) Served

Immigrants and migrants

Type of Metric

Output - describing our activities and reach

Direction of Success


Our Sustainable Development Goals

SOURCE: Self-reported by organization

Learn more about Sustainable Development Goals.

Goals & Strategy

SOURCE: Self-reported by organization

Learn about the organization's key goals, strategies, capabilities, and progress.

Charting impact

Four powerful questions that require reflection about what really matters - results.

Solidarity Engineering is committed to reducing human suffering by applying community-driven engineering in places in crisis. As an engineering organization, a large majority of our work is focused on addressing critical gaps in WASH and other infrastructure in refugee camps along the U.S.-Mexico border. However, we are a diverse and multidisciplinary organization, consisting of team members with backgrounds in a variety of disciplines beyond engineering, such as public health, nursing, research, and logistics. Through interdisciplinary efforts, we can better respond to beneficiary and community needs in a holistic and sustainable manner.

Our top priority is to empower the communities we work with by prioritizing their interests, incorporating their feedback, and building up their capacity. Working alongside healthcare professionals allows us to tackle problems collaboratively. Medical professionals often treat the symptoms of disease. Engineers can treat the cause. Only together can we solve health-related problems and achieve our joint goal of reducing suffering.

Our engineering interventions are unique and innovative, and they allow for holistic and multidisciplinary solutions. There are no other engineering or technical groups that work along the U.S.-Mexico border, and we implement the following initiatives to alleviate suffering and to improve the standard of living in the camps, with the aim of creating a safer and more humane environment for this marginalized population:

-WASH (water, sanitation, and hygiene) projects
-Technical site design, mapping and planning
-Research & development projects for water treatment and emergency response equipment
-Shelter infrastructure design and construction management
-Stormwater management and flood mitigation
-Constructing safe spaces for children within the camps (soccer fields, schools, playgrounds, etc.)
-Educational outreach: STEM (science, technology, engineering, and math) classes for children; english classes for women; menstrual hygiene management classes for women and girls
-Advocacy and social engagement (podcast and social media platforms)
-Public health research

Additionally, we periodically implement emergency-response trips in order to provide access to lifesaving WASH resources (such as water filters and hygiene kits) to displaced populations who are making their journey to U.S.-Mexico border.

How we listen

SOURCE: Self-reported by organization

Seeking feedback from people served makes programs more responsive and effective. Here’s how this organization is listening.

done We shared information about our current feedback practices.
  • How is your organization using feedback from the people you serve?

  • Which of the following feedback practices does your organization routinely carry out?

  • What challenges does the organization face when collecting feedback?


Solidarity Inc

Financial data

SOURCE: Self-reported by organization

Solidarity Inc

Revenue & expenses

Fiscal Year: 2022

SOURCE: Self-reported by organization

Contributions, Grants, Gifts $353,620
Program Services $0
Membership Dues $0
Special Events $0
Other Revenue $0
Total Revenue $353,620
Program Services $157,276
Administration $52,831
Fundraising $0
Payments to Affiliates $0
Other Expenses $0
Total Expenses $210,107

Solidarity Inc

Balance sheet

Fiscal Year: 2022

SOURCE: Self-reported by organization

Total Assets $149,502
Total Liabilities $430
Fund balance (EOY)
Net Assets $149,073


The people, governance practices, and partners that make the organization tick.

Form 1023/1024 is not available for this organization

Executive Director, Co-Founder

Erin Hughes

As Executive Director, Founder, and Licensed Professional Engineer, Erin leads the Solidarity team as they implement humanitarian engineering projects to address displaced populations in need. Specializing in stormwater management, she holds both a B.A. and M.S. in Environmental Engineering from Drexel University and currently lives in Philadelphia, PA.

There are no officers, directors or key employees recorded for this organization

There are no highest paid employees recorded for this organization.

Solidarity Inc

Board of directors
as of 11/09/2023
SOURCE: Self-reported by organization
Board of directors data
Download the most recent year of board of directors data for this organization
Board chair

Erin Hughes

Solidarity Engineering

Chloe Rastatter

Solidarity Engineering

Organizational demographics

SOURCE: Self-reported; last updated 11/9/2023

Who works and leads organizations that serve our diverse communities? Candid partnered with CHANGE Philanthropy on this demographic section.


The organization's leader identifies as:

Race & ethnicity
Gender identity
Female, Not transgender (cisgender)
Disability status
Person without a disability

Race & ethnicity

Gender identity


Sexual orientation

No data